Traitormode won't choose the first client as the target, admin can be traitor/target, banlist & removing IPs, environment dust particles, clients are responsible for the KillCharacter message of their own character, moar backgroundfish, syncing item FixRequirement states, longer gameserver tickrate

Subsurface/Source/GUI/GUIComponent.cs

@@ -359,6 +359,7 @@ namespace Barotrauma
 
         public virtual void RemoveChild(GUIComponent child)
         {
+            if (child == null) return;
             if (children.Contains(child)) children.Remove(child);            
         }