^The difference is that your average, law-abiding citizen doesn't have a clue how to work a gun. I can guarantee that at least half the time, a citizen with a gun is either gonna freak out or get pissed off, and invariably accidentally or even intentionally kill some poor shmuck who's armed with his index finger. I don't condone criminal behavior, obviously, but that guy with the pantyhose mask who wants the 4 dollars in your wallet doesn't deserve to have three bullets emptied into his torso and drown in his own blood. People don't know how to work guns well enough to all deserve them.