what do they all teach a class full of ninjas?
I am sure you might hear someone get up and come walking or running at them! And do you think EVERY student there will not say “WATCH OUT MRS BADASSWITHAGLOCK TEACHER”!
and again, if you have someone that wants to do that, they will find a way like you said. But hey, atleast the teacher nextdoor is also armed and can kick the door down and try to save some people.
you cant stop/fix stupid… only try to help it