Hmm.. when I think of weapons of mass destruction, i think of nuclear, biological, and chemical weapons. Another thing that worries me, if we actually lived in a civilized society, we wouldn't have to worry about psychos going out and killing people for fun. Since we don't, we also can't count on those same psychos to obey laws that restrict their ability to own weapons. If it wasn't a gun, it would be a knife, or a sword, or a bow, or a poision dart. There are lots of easy ways to kill people, and a creative psycho will find them all. Lets worry about the psychos instead of the tools.