There's a bug on the server where creepers can do no damage to you at all. Instead of exploding like they are supposed do, they just despawn right before the explosion. This makes them useless. It was purposefully added to keep them from griefing, but there's a better way to do that. We need to turn all mob griefing to off using the game rule. This would also prevent withers from blowing up structures but not the damage they can do to players. It would also prevent Endermen from picking up and moving blocks.