If your friends can't hit anything, it won't help to have them shoot your gun. But have you tried shooting theirs? If you hit in the same place with several guns, it's probably you. If you're in the center with the others, it's your gun.
"An armed society is a polite society." — Robert A. Heinlein
"After a shooting spree, they always want to take the guns away from the people who didn't do it. I sure as hell wouldn't want to live in a society where the only people allowed guns are the police and the military."
— William S. Burroughs