@br0nah,
I think that the notifications are only for extreme repeat offenders, slight after school detentions should work on the others if anything will, that quickly.
Some parents are similar and that is where it is from, so notification might work for you, but not on all them.
No kid wants to wait in school at closing time.
Unless they are engaged in something very enjoyable to them.
I do see your point though, I hope you raise some concern, kids these days do get petty and do copy it if it is happening all the time.
If they put you in the 'remedial' room, it is quite the slander in return, if they are really very horrible.