Minecraft wiki entry for Player_versus_Player, associated text: If you're building a massive fortress near the spawn, a griefer or simply a plain idiot might run behind you and kill you, disassemble your fortress and run off with your materials. Well, the easiest method to prevent this is to build your house away from spawn and try to survive a good distance away from spawn. It is usually a good idea to use the /sethome command around this area where you wish to live, as if it is a long way away from spawn and you die, it's a long walk, or mad chase if there are spawnkillers with diamond armor and enchanted diamond swords. Using the /home command if you used /sethome cuts the time getting to your safe zone drastically, usually having the spawnkillers and griefers be dazzled in confusion.