diff --git a/app/Console/Commands/ConfirmUser.php b/app/Console/Commands/ConfirmUser.php
index daeb24e..a907e0e 100644
--- a/app/Console/Commands/ConfirmUser.php
+++ b/app/Console/Commands/ConfirmUser.php
@@ -39,7 +39,9 @@ class ConfirmUser extends Command
     public function handle()
     {
         $u = User::resolve($this->argument('user'));
-        $u->update('confirmed', true);
+        $u->update(['confirmed' => true]);
         $this->info("User #$u->id with e-mail $u->email and handle @$u->name was confirmed.");
+
+        dd($u);
     }
 }
diff --git a/app/Http/Controllers/TableController.php b/app/Http/Controllers/TableController.php
index c9b2568..60e21d8 100644
--- a/app/Http/Controllers/TableController.php
+++ b/app/Http/Controllers/TableController.php
@@ -189,12 +189,19 @@ class TableController extends Controller
         // Preparing data to insert into the Rows table
         $rowsData = null;
         try {
-            $rowsData = array_map(function ($row) use ($columns) {
-                if (count($row) == 0 || count($row)==1&&$row[0]=='') return null;
+            $grid_range = Row::allocateGRIDs(count($rowTable));
+            $grid_cnt = $grid_range[0];
+
+            $rowsData = array_map(function ($row) use ($columns, &$grid_cnt) {
+                if (count($row) == 0 || count($row) == 1 && $row[0] == '') return null;
                 if (count($row) != count($columns)) {
                     throw new NotApplicableException("All rows must have " . count($columns) . " fields.");
                 }
-                $parsed = [];
+
+                $parsed = [
+                    '_grid' => $grid_cnt++
+                ];
+
                 foreach ($row as $i => $val) {
                     $key = $columns[$i]->name;
                     if (strlen($val) > 255) {
diff --git a/app/Http/Kernel.php b/app/Http/Kernel.php
index 749392b..a4689cf 100644
--- a/app/Http/Kernel.php
+++ b/app/Http/Kernel.php
@@ -2,6 +2,13 @@
 
 namespace App\Http;
 
+use App\Http\Middleware\ActivatedAccount;
+use App\Http\Middleware\EncryptCookies;
+use App\Http\Middleware\RedirectIfAuthenticated;
+use App\Http\Middleware\ThrottleIfNotDebug;
+use App\Http\Middleware\TrimStrings;
+use App\Http\Middleware\TrustProxies;
+use App\Http\Middleware\VerifyCsrfToken;
 use Illuminate\Foundation\Http\Kernel as HttpKernel;
 
 class Kernel extends HttpKernel
@@ -16,9 +23,9 @@ class Kernel extends HttpKernel
     protected $middleware = [
         \Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class,
         \Illuminate\Foundation\Http\Middleware\ValidatePostSize::class,
-        \App\Http\Middleware\TrimStrings::class,
+        TrimStrings::class,
         \Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull::class,
-        \App\Http\Middleware\TrustProxies::class,
+        TrustProxies::class,
     ];
 
     /**
@@ -29,12 +36,12 @@ class Kernel extends HttpKernel
     protected $middlewareGroups = [
         'web' => [
             'throttle:120,15', // try to prevent people refresh-spamming the server to game table visit counts
-            \App\Http\Middleware\EncryptCookies::class,
+            EncryptCookies::class,
             \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
             \Illuminate\Session\Middleware\StartSession::class,
             // \Illuminate\Session\Middleware\AuthenticateSession::class,
             \Illuminate\View\Middleware\ShareErrorsFromSession::class,
-            \App\Http\Middleware\VerifyCsrfToken::class,
+            VerifyCsrfToken::class,
             'bindings',
         ],
 
@@ -52,14 +59,14 @@ class Kernel extends HttpKernel
      * @var array
      */
     protected $routeMiddleware = [
-        'activated' => \App\Http\Middleware\ActivatedAccount::class,
+        'activated' => ActivatedAccount::class,
         'auth' => \Illuminate\Auth\Middleware\Authenticate::class,
         'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
         'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
         'cache.headers' => \Illuminate\Http\Middleware\SetCacheHeaders::class,
         'can' => \Illuminate\Auth\Middleware\Authorize::class,
-        'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
+        'guest' => RedirectIfAuthenticated::class,
         'signed' => \Illuminate\Routing\Middleware\ValidateSignature::class,
-        'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
+        'throttle' => ThrottleIfNotDebug::class,
     ];
 }
diff --git a/app/Http/Middleware/ThrottleIfNotDebug.php b/app/Http/Middleware/ThrottleIfNotDebug.php
new file mode 100644
index 0000000..721b27e
--- /dev/null
+++ b/app/Http/Middleware/ThrottleIfNotDebug.php
@@ -0,0 +1,19 @@
+<?php
+
+
+namespace App\Http\Middleware;
+
+
+use Illuminate\Routing\Middleware\ThrottleRequests;
+
+class ThrottleIfNotDebug extends ThrottleRequests
+{
+    public function handle($request, \Closure $next, $maxAttempts = 60, $decayMinutes = 1)
+    {
+        if (config('app.debug')) {
+            return $next($request);
+        }
+
+        return parent::handle($request, $next, $maxAttempts, $decayMinutes);
+    }
+}
diff --git a/app/Models/Row.php b/app/Models/Row.php
index f55b137..2ef2c63 100644
--- a/app/Models/Row.php
+++ b/app/Models/Row.php
@@ -6,7 +6,7 @@ namespace App\Models;
  * Row in a data table
  *
  * @property int $id
- * @property string $data - JSONB
+ * @property string $data - JSONB, always containing _grid
  */
 class Row extends BaseModel
 {
@@ -16,4 +16,39 @@ class Row extends BaseModel
 
     protected $guarded = [];
     public $timestamps = false;
+
+    public function getGridAttribute() {
+        return $this->data->_grid;
+    }
+
+    public function setGridAttribute($value) {
+        $this->data->_grid = $value;
+    }
+
+    /**
+     * Allocate a single Global Row ID, application-unique.
+     *
+     * GRIDs are used to uniquely identify existing or proposed new rows,
+     * and are preserved after row modifications, to ensure change proposals have
+     * a clear target.
+     *
+     * @return int
+     */
+    public static function allocateGRID()
+    {
+        return \DB::selectOne("SELECT nextval('global_row_id_seq') AS grid;")->grid;
+    }
+
+    /**
+     * Allocate a block of Global Row IDs, application-unique.
+     *
+     * @see Row::allocateGRID()
+     *
+     * @return int[] first and last
+     */
+    public static function allocateGRIDs($count)
+    {
+        $last = \DB::selectOne("SELECT multi_nextval('global_row_id_seq', ?) AS last_grid;", [$count])->last_grid;
+        return [$last - $count + 1, $last];
+    }
 }
diff --git a/app/Models/User.php b/app/Models/User.php
index 7a88274..ccc61ef 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -62,7 +62,7 @@ class User extends BaseModel implements
      * @var array
      */
     protected $fillable = [
-        'name', 'title', 'email', 'password', 'bio', 'website'
+        'name', 'title', 'email', 'password', 'bio', 'website', 'confirmed'
     ];
 
     /**
@@ -183,6 +183,10 @@ class User extends BaseModel implements
         }
         else {
             $u = static::where('email', $ident)->first();
+
+            if (!$u) {
+                $u = static::where('name', $ident)->first();
+            }
         }
 
         if (!$u) throw new NotExistException("No user found matching \"$ident\"");
diff --git a/app/Tables/Column.php b/app/Tables/Column.php
index a8c41a0..1b32bc3 100644
--- a/app/Tables/Column.php
+++ b/app/Tables/Column.php
@@ -57,6 +57,10 @@ class Column implements JsonSerializable
         $this->title = $b->title;
         $this->type = $b->type;
 
+        if ($this->name == '_grid') { // global row ID
+            throw new NotApplicableException("_grid is a reserved column name.");
+        }
+
         if (!in_array($this->type, self::colTypes)) {
             throw new NotApplicableException("\"$this->type\" is not a valid column type.");
         }
diff --git a/database/migrations/2018_08_01_204822_add_row_sequence_generator.php b/database/migrations/2018_08_01_204822_add_row_sequence_generator.php
new file mode 100644
index 0000000..6493881
--- /dev/null
+++ b/database/migrations/2018_08_01_204822_add_row_sequence_generator.php
@@ -0,0 +1,54 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddRowSequenceGenerator extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        // https://www.depesz.com/2008/03/20/getting-multiple-values-from-sequences/
+        DB::unprepared(/** @lang PostgreSQL */
+            <<<PGSQL
+CREATE OR REPLACE FUNCTION multi_nextval(use_seqname TEXT, use_increment INT4) RETURNS INT4 AS $$
+DECLARE
+    reply int4;
+BEGIN
+    perform pg_advisory_lock(20180801);
+    execute 'ALTER SEQUENCE ' || quote_ident(use_seqname) || ' INCREMENT BY ' || use_increment::text;
+    reply := nextval(use_seqname);
+    execute 'ALTER SEQUENCE ' || quote_ident(use_seqname) || ' INCREMENT BY 1';
+    perform pg_advisory_unlock(20180801);
+    return reply;
+END;
+$$ LANGUAGE 'plpgsql';
+PGSQL
+);
+        DB::unprepared('CREATE SEQUENCE global_row_id_seq START 0 MINVALUE 0;');
+        // We have to increment manually once before the above function can be used - that is because
+        // nextval will return the initial value the first time it's called, so it would not advance by
+        // the given step at all. This would give us negative values - not a problem in postgres without unsigned
+        // types, but it loooks bad.
+        DB::select("SELECT nextval('global_row_id_seq') as nv;");
+
+        // The multi_nextval() is concurrency-safe, except it can sometimes happen that
+        // nextval in other connection also increments by the bigger step. The only downside is "wasted IDs".
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        DB::unprepared('DROP FUNCTION IF EXISTS multi_nextval(TEXT, INT4);');
+        DB::unprepared('DROP SEQUENCE IF EXISTS global_row_id_seq;');
+    }
+}
diff --git a/database/migrations/2018_08_01_213353_make_grid_column_mandatory_in_rows_table.php b/database/migrations/2018_08_01_213353_make_grid_column_mandatory_in_rows_table.php
new file mode 100644
index 0000000..450f99c
--- /dev/null
+++ b/database/migrations/2018_08_01_213353_make_grid_column_mandatory_in_rows_table.php
@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class MakeGridColumnMandatoryInRowsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        DB::unprepared("ALTER TABLE rows ADD CONSTRAINT grid_must_exist CHECK (data ? '_grid');");
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        DB::unprepared("ALTER TABLE rows DROP CONSTRAINT grid_must_exist;");
+    }
+}
diff --git a/porklib/Utils/Utils.php b/porklib/Utils/Utils.php
index 631f1ef..1d1b6a7 100644
--- a/porklib/Utils/Utils.php
+++ b/porklib/Utils/Utils.php
@@ -557,6 +557,7 @@ class Utils
 	public static function logQueries()
 	{
 		\DB::listen(function ($query) {
+            $b = [];
             /** @var QueryExecuted $query */
             foreach ($query->bindings as $i=>$binding) $b[$i] = "'$binding'";
             Log::debug('SQL: ' . preg_replace_array('/\\?/', $b, $query->sql));
diff --git a/resources/views/table/_action-buttons.blade.php b/resources/views/table/_action-buttons.blade.php
index 8cdfe37..f026f42 100644
--- a/resources/views/table/_action-buttons.blade.php
+++ b/resources/views/table/_action-buttons.blade.php
@@ -10,25 +10,26 @@
   @sr(Table actions)
 
 {{-- Disabled until implemented --}}
-@if(true)
 
   @if(guest() || !user()->confirmed || user()->ownsTable($table))
+    {{-- Guest, unconfirmed, or a table owner --}}
 
     {{-- Passive fork buttons with counter --}}
     <a href="" class="btn btn-outline-primary py-1 btn-sm" title="Forks"
        data-toggle="tooltip" data-placement="top">
-      {{ $table->forks_count ?: '–' }}&nbsp;
-      @icon(fa-code-fork, sr:Forks)
+      @icon(fa-code-fork, sr:Forks)&nbsp;
+      {{ $table->forks_count ?: '–' }}
     </a>
 
     {{-- Passive favourite buttons with counter --}}
     <a href="" class="btn btn-outline-primary py-1 btn-sm"
        title="Favourites" data-toggle="tooltip" data-placement="top">
-      {{ $table->favourites_count ?: '–' }}&nbsp;
-      @icon(fa-star, sr:Favourites)
+      @icon(fa-star, sr:Favourites)&nbsp;
+      {{ $table->favourites_count ?: '–' }}
     </a>
 
   @else
+    {{-- Logged in and does not own the table --}}
 
     {{-- Active fork button | counter --}}
     <div class="btn-group" role="group" aria-label="Fork">
@@ -55,7 +56,6 @@
           @icon(fa-star-o, sr:Favourite)
         </a>
       @endif
-
       <a href="" class="btn btn-outline-primary py-1 btn-sm" title="Favourite Count"
          data-toggle="tooltip" data-placement="top">
         {{ $table->favourites_count ?: '–' }}
@@ -67,8 +67,8 @@
   {{-- Comments button with counter --}}
   <a href="" class="btn btn-outline-primary py-1 btn-sm" title="Comments"
      data-toggle="tooltip" data-placement="top">
-    {{ $table->comments_count ?: '–' }}&nbsp;
-    @icon(fa-comment, sr:Comments)
+    @icon(fa-comment, sr:Comments)&nbsp;
+    {{ $table->comments_count ?: '–' }}
   </a>
 
   {{-- Active proposals button | counter --}}
@@ -77,22 +77,25 @@
        data-toggle="tooltip" data-placement="top">
       @icon(fa-inbox fa-pr, sr:Change Proposals){{ $table->proposals_count ?: '–' }}
     </a>
-    @if(user()->ownsTable($table))
-      <a href="" class="btn btn-outline-primary py-1 btn-sm btn-square" title="Draft Change"
-         data-toggle="tooltip" data-placement="top">
-        @icon(fa-pencil, sr:Draft Change)
-      </a>
-    @else
-      <a href="" class="btn btn-outline-primary py-1 btn-sm btn-square" title="Propose Change"
-         data-toggle="tooltip" data-placement="top">
-        @icon(fa-pencil, sr:Propose Change)
-      </a>
-    @endif
+    @auth
+      @if(user()->ownsTable($table))
+        {{-- Table owner logged in --}}
+        <a href="" class="btn btn-outline-primary py-1 btn-sm btn-square" title="Draft Change"
+           data-toggle="tooltip" data-placement="top">
+          @icon(fa-pencil, sr:Draft Change)
+        </a>
+      @else
+        {{-- Not a table owner --}}
+        <a href="" class="btn btn-outline-primary py-1 btn-sm btn-square" title="Propose Change"
+           data-toggle="tooltip" data-placement="top">
+          @icon(fa-pencil, sr:Propose Change)
+        </a>
+      @endif
+    @endauth
   </div>
 
-@endif
-
-  @if(user() && user()->ownsTable($table))
+  @if(authed() && user()->ownsTable($table))
+    {{-- Table opts menu for table owner --}}
     <a href="{{ $table->settingsRoute }}" class="btn btn-outline-primary py-1 btn-sm"
        title="Table Options" data-toggle="tooltip" data-placement="top">
       @icon(fa-wrench, sr:Table Options)
diff --git a/resources/views/table/_rows.blade.php b/resources/views/table/_rows.blade.php
index c1cd7c9..019a4f4 100644
--- a/resources/views/table/_rows.blade.php
+++ b/resources/views/table/_rows.blade.php
@@ -4,12 +4,13 @@
 
 @php
   /** @var object[] $columns */
-  /** @var \App\Models\Row[]|array[][] $rows */
+  /** @var \App\Models\Row[] $rows */
 @endphp
 
 <table class="table table-hover table-sm">
   <thead>
   <tr>
+    <th>#GRID</th>
     @foreach($columns as $col)
       <th>{{ $col->title }}</th>
     @endforeach
@@ -18,8 +19,9 @@
   <tbody>
   @foreach($rows as $row)
     <tr>
+      <td>{{ $row->data->_grid }}</td>
       @foreach($columns as $col)
-        <td data-id="{{ $row->id }}">{{ $row['data']->{$col->name} }}</td>
+        <td data-id="{{ $row->id }}">{{ $row->data->{$col->name} }}</td>
       @endforeach
     </tr>
   @endforeach