When I was a kid, each wing of the school was for a different grade. And once a month, the school would punish the wing that was the filthiest by publicly announcing it on the speakers.

So kids would go out of their way to sabotage other wings. It really backfired when one wing was proud to be the filthiest, and would actively destroy their side of their school the day before the announcement. And when they were called out, you can hear the cheering.