Minecraft wiki entry for Player_versus_Player, associated text: If you want griefers or spawn killers on your side, be really nice to them. Most of them are notoriously good at PvP from practice, and giving them a reason to be on your side through making sure they never have to worry about starving or being hunted by others is a good way to avoid alienating them. Ironically, this may be the most effective way to make allies with random people, giving them full access to all of your resources and your considerable efforts to be hospitable will generally remove any want to take your items. (As always, this may backfire).