Like another poster said we have to find out why these people snap, and stop focusing on just the tools they use after they snap. With that same type of thinking there is an over abundance of alcohol in the country as well if you halt that , wouldn’t that cut down on drunk driving? Or better yet lets focus on the vehicles that drunk drivers use, if we reduce them wouldn’t that cut down on drunk driving? I am not trying to look down on any of these horrible acts, but again we should focus on what makes these people come to do these crimes, and stop focusing on the tools they use to carry them out.