Oh oh oh and while I'm throwing my 2 cent pieces around, yeah, gun control laws are kind of like marijuana laws, if somebody really wants marijuana they can get it, but, well, a person might be able to get a few grams of the stuff and get a bit stoned but if it's illegal than it's very difficult to get a giant shopping bag of it and just carry it with you on the bus home, maybe smoking some on the way.
While we're on the topic, a country where it's legal for kids to own guns but not for adults to smoke weed- like, in most states- is silly, but anyway...
Yeah, making guns illegal wouldn't get rid of them, however, the people who owned guns would all be people who were willing to break the law for some reason or another to get them- some would just be ordinary people protecting themselves, but the majority of them would probably be criminals, plus, like marijuana, it would only drive up the price of the product by making it illegal and create a bigger black market for it and that kind of thing.
Killers would have to pre-meditate and get the gun beforehand and be at risk of arrest before their killing spree or whatever, by owning one, while a normal law abiding man who suddenly finds his wife in bed with the milkman might have time to calm down about it while he's looking for an illegal gun merchant instead of having his gun ready in his glovebox to kill them both with.
So, might decrease crimes of passion but won't stop killing sprees...