When I was a young’un, living in rural Washington state, we could bring our rifles to school during hunting season. Mind you, we had to leave the ammo in the office, until our dads would come and pick us up after school to go hunting. And yes, missing school on the opening day of hunting season was considered ok.
How times have changed (and this was in the 1980s). It never would’ve occurred to any of us to start blowing away our classmates.