My school briefly had a rule that when you were late, you could take a note (3 notes = detention), OR you could go to headmaster and explain yourself during lunchbreak.

Lunchbreak was 40 minutes, so if you stood there for more than 40 minutes, you'd be late for the next class, meaning you'd of course show up again tomorrow. Repeat for a while and there were kids lined up through the hallway, standing in line to explain they were late due to standing in line.

The rule only lasted a few weeks. They changed it so that you could get 9 notes before detention.