Dress Code Violation
I went to a private school where the teachers were real power hungry jerks, you could get in trouble for having your shirt untucked, and some would be really mean about it, literally crouched down and scooting along the benches at lunch time, ie even at lunch if it popped out while sitting you could get in trouble.
I ran through the school hand book and it said sweaters with the school emblem can be worn at any time, so I bought one 3 sizes too big and wore it constantly, it went down to almost my knees and I would happily announced that i wasn’t even wearing the uniform shirt let alone tucking it in. The teachers got miffed off and took it to the school dean but I was right and it was allowed, like half the school switched to sweaters after that.
Story credit: Reddit / demonardvark