Oh how times have changed. In the early seventies when I was still in school, I brought an inert hand grenade to school and we had great fun leaving it on teachers desks and watching their reaction. The most serious punishment we received was a dirty look. And by the way, back then, the inert grenades still had the spring and hammer intact so when you pulled the pin the spoon would fly off.
In the early sixties when I was still in school, a student brought a WWII souvenir P-38 to school on the bus for some sort of class thing. Don't know exactly what since he wasn't in my class. (For those who don't know, a P-38 is a German 9mm pistol.)
I went to school in the fifties. Boy, I really am an old fa..... Anyway, during hunting season we would bring our shotguns to school so we could hunt rabbits on our way home. We had to put them in the coat room. Some of us would also tend our trap lines on the way to school, but that is another story.