Fix gamerule!

src/de/steamwar/misslewars/MissileWars.java

@@ -97,7 +97,10 @@ public class MissileWars extends JavaPlugin {
 		Bukkit.getWorlds().forEach(world -> {
 			world.setGameRule(GameRule.KEEP_INVENTORY, true);
 			world.setGameRule(GameRule.DO_TILE_DROPS, false);
+			world.setGameRule(GameRule.MOB_GRIEFING, false);
 		});
+
+		// TODO: Enable Item Dropping, and the own team can pick them up! Add config value for that?
 	}
 
 	public static void waiting() {