If not guns, what else will mass murders kill people with? Knifes? Axes? Chainsaws? The answer might be home-made guns, which could be dangerous even to the shooter. But in my opinion, we should have all the guns we want. Then, it would take an idiot, or mental person to rob a house/store, or kill people, because they're is going to be at least 2+ people with guns of their own. But that's just me.