At our high school most of the pickup trucks had gun racks. It wasn't until like, my sophomore year of high school before anyone even considered "Hey... those shouldn't be on school grounds". We all knew quite well "no guns allowed in the school", but rifles were about as common as umbrellas and considered equally notable. One day a nice officer noticed there were like five trucks with rifles visible in the back window, and went to the office to ask the students be advised _they might be stolen_. Halfway through that conversation it dawned on them that they were in fact guns, and then an announcement was made on the PA reminding students that they were actully still guns and were very banned in school so people should take them home after school and not bring them back.

ONE student forgot the next day (who was a "bad" kid but not actually a bad guy) and was allowed to apologize to the school for his forgetfulness over the PA to make amends. (I shared a class with him when he got called to the office, so I know he was embarrassed to have forgotten. It was bad for his carefully cultivated "bad boy" reputation to get caught out doing something this trivial.)

The difference between then and now is that since people were always interacting in person there was less tendency for people to become psychopath basement trolls who would willfully bully someone to the breaking point and beyond.