Most teachers I know shouldn't be trusted with any potentially dangerous device.
I agree, but there are exceptions. My kids had a HS student adviser who thought he might be the only person in Massachusetts who was a member of both the NEA and the NRA, although he kept the stickers off of his car.
But, I've seen a lot of teachers--who after all, are mostly knee-jerk liberals--who are far too irresponsible to be trusted with deadly force.