I like the joke in Wyoming, and seen it in Texas, where a guy goes into a grocery store and pulls out a gun saying "this is a stickup", and instantly, no less than a dozen customers pull out their CCWs and hold them on the gunman. An armed socity is a polite society. What if that student Cho, had half an inkling that students in the classroom could end his game before it started, or that the gals he was stalking, could stop him dead if he even tried to approach them? Would he try anyways, knowing he probably could not exact some imaginary revenge before feeling the pain of a bullet?