Wear Your IDs
It wasn’t really the rule that was dumb but the reason for it. In my last year of high school, the school issued a rule that all students had to wear student IDs. If you didn’t, you had to immediately go and pay for another ID. While you can see how many students may have seen this as a way to skip class, the reason for this was the school shootings that happened the previous year.
The reasoning was that it would be easier to spot who is a student and who is not a student to then see who has malicious intent – except that most shooters were students.