So my wife tells a great story at dinner parties - she went to a very prestigious all-girls school for most of her collegiate career in downtown Toronto. She had to wear a kilt as part of the uniform. When she was in grade 8 or so a trend hits the school where the girls start wearing boxer shorts under their kilt. This was to signal to your classmates that you had a boyfriend and he had removed his boxers. Most times it was girls wearing their stolen brothers boxers to fit in.
So the administrations catches wind of this and warns the girls that it’s against school dress code policy. Nothing much changes. So on a Friday morning, the principal, a middle-aged man, and THE MUSIC TEACHER, another middle aged man, call all the girls into the gymnasium, line them up and ask them to lift up their skirts to reveal if they are wearing boxers or more appropriate undergarments. Every girl who was wearing boxers was sent home.
This happened for 3 fridays before someone told their parents. Needless to say it stopped after that.