It was more what they didn't do. Back in high school, I got bullied. And one time, during a longer break, another student and me, we figured, we'd borrow a soccer ball from another student, without asking.
Well, when that student returned, of course, he'd take issue with it, not because there was an issue, but because I was involved. And the other student who played ball with me, the spineless traitor, started lying that it was entirely my idea to grab the ball.
The teacher did a whole intervention thingy, sitting the whole class down to talk about this, without realizing that:
It's a fucking non-issue. Even if I had destroyed that ball, just buy a fucking 'nother.
Of course, I did not fucking come to the idea to take a ball without someone else who also wanted to play.
I didn't get punished or anything. But that teacher, being an adult and all, should have realized that it's absolute horseshit and should have had my back.
So, you took something that wasn’t yours, and were part of a general discussion about taking things that aren’t yours with the entire class, and you weren’t punished otherwise? You should be praising that teacher, who showed a real grasp of proportionality. They addressed an infraction in an equitable way and matched the seriousness of the issue with their response.
That student brought it to school to play with the class during breaks. It was quite normal that others borrowed it and he never had a problem with it. And it's not like the ball was taken away. At best, it had mild usage marks, which again, would have been no problem at all to compensate financially.
Edit: You might be thinking of the American-style school system where classes are a lot looser, i.e. different per subject. I'm speaking of a European(?)-style school system, where a class has all subjects together.
So, the ball-bringing student knew me and the other student quite well, and had no reason to worry that we'd not return the ball or whatever.