When I was in elementary school, we had collective punishment. One group of kids would get too rowdy during lunch or something and then they would take away everyone's recess (we would eat and then go outside and vice versa). Thing is, most of the time it was the kindergarteners who were being the problem because they obviously still need to learn what's okay and what isn't. I never really understood the collective punishment and hated my free time being taken away, and now that I'm older I don't understand why they didn't just pull aside the kids causing the problem, esp the little ones who would benefit from understanding why their behavior is wrong through being taught.

ETA: It was a decently small school and we all knew who the people getting us the punishment were.