The pro-gun crowd always uses this argument. "If a good guy has a gun, he can kill the bad guy before the bad guy can kill too many civilians." This, of course, assumes that you're capable of maintaining your cool and shooting with accuracy when bullets start whizzing by you. I have a friend who is in law enforcement and he said criminals have significantly better aim than the police because they get into shootouts more often. The pro-gun crowd doesn't pay heed to things like that. Ask them if they could have stopped the shootout in Colorado, they will always respond yes. A dark movie theater full of people panicking and running for the exits, a gunman spraying bullets at random into the crowd; yes, they believe they'd be able to spot him and put him down with precision without losing their cool.