A couple of problems with your idiotic solution:
1) What happens if a teach goes nuts?
Do all his students automatically die?
2) Most profs don't have any hand-eye coordination, as all they did was READ and STUDY as a child, not play sports, participate in physical activity...etc.
Do you now feel safer with a prof wielding and waving a loaded gun.
This dude's argument must be a joke, cuz it's the dumbest thing I ever heard.