You can no longer place unless you are in admin or sandbox.

Content.Server/Sandbox/SandboxManager.cs

@@ -1,6 +1,8 @@
 using Content.Server.GameTicking;
 using Content.Server.Interfaces.GameTicking;
 using Content.Shared.Sandbox;
+using Robust.Server.Console;
+using Robust.Server.Interfaces.Placement;
 using Robust.Server.Interfaces.Player;
 using Robust.Server.Player;
 using Robust.Shared.Enums;
@@ -15,6 +17,8 @@ namespace Content.Server.Sandbox
         [Dependency] private readonly IPlayerManager _playerManager;
         [Dependency] private readonly IServerNetManager _netManager;
         [Dependency] private readonly IGameTicker _gameTicker;
+        [Dependency] private readonly IPlacementManager _placementManager;
+        [Dependency] private readonly IConGroupController _conGroupController;
 #pragma warning restore 649
 
         private bool _isSandboxEnabled;
@@ -36,6 +40,24 @@ namespace Content.Server.Sandbox
 
             _playerManager.PlayerStatusChanged += OnPlayerStatusChanged;
             _gameTicker.OnRunLevelChanged += GameTickerOnOnRunLevelChanged;
+
+            _placementManager.AllowPlacementFunc = placement =>
+            {
+                if (IsSandboxEnabled)
+                {
+                    return true;
+                }
+
+                var channel = placement.MsgChannel;
+                var player = _playerManager.GetSessionByChannel(channel);
+
+                if (_conGroupController.CanAdminPlace(player))
+                {
+                    return true;
+                }
+
+                return false;
+            };
         }
 
         private void GameTickerOnOnRunLevelChanged(GameRunLevelChangedEventArgs obj)