A knife is just as dangerous if not more. I cannot jam, stick, run out of ammunition, and an attacker doesn't require training on how to use it. (Yes that is a quote from Flashpoint for anyone paying attention.) Also, a person within 21 feet of you with a knife can be on top of you and doing serious damage basically in the blink of an eye. Yes some knives are illegal, just a some firearms are illegal. I carry a folding knife daily, potentially I can have the same "temptation" to do something just as stupid. I'm with Darkangel, people are the problem, guns are simply a tool being used to carry out these terrible acts of violence.