[BitWielder1]

No, we're becoming a police state already.
After patrolling for years with nothing happening they will be snoozing or playing cards in a back room.
More conservative teachers with guns would be better, they have to be where the students are and be awake anyway.

[RobbyS]

An alternative would be an administrator or two trained to handle a gun. This could be locked up until needed. He/she needs tactical training, too, of course.