As for mass casualty events, machetes, knives, bombs, starvation, fires, clubs or baseball bats? These clearly are not pizzas, yet have been used to kill multitudes, over and over again. How about this, let's make a law against murder. That will stop it all cold in it's tracks, right? Whoops, not so much, mankind is wicked to the core. It's not the preferred weapon of choice, it's the heart.