Minecraft wiki entry for Player_versus_Player, associated text: Not always will enemies come via broken brick walls. They might just come through the front door. Hide your entrances and fool enemies with fake entrances. Make sure all your team knows of them. Maybe one can use a special circuit (weighted pressure plates) so that a first number of times (could be the number of players in your team) that an entrance is entered it's safe but then anyone who go in will fall into the trap.