shooting someone in the back of the head with a paintball isn't going to kill them. thats just stupid. if it was lethal it would be illegal. maybe if you shot someone multiple (ie more than about 10) times in the same place you might run a risk of concussion, but it aint gonna kill you. when you go to mug someone your generally not going to stop to think about it, you put a ton of paint into the other side of the bunker where you think the other guy might be but you keep going to the next piece of cover. its not overshooting unless you know they have already been called out. If you dont like it wear a cap-you can even get ones with a plastic lining designed for getting bottles and the like chucked off your head. At most getting shot 6 times in the back of the head is gonna suck, real bad, for a day or two, but then if you cant take it you should prob be playing lazer quest.