Much of the bullying in Hameln's Castanets was kinda instigated by himself.
I'm surprised no one thinks that
Spoiler for Ep 7 moment:
Stripping a woman in the middle of class, having her run out in fear only to be chased by everyone down the halls is exaggerated. This would almost never work in real life. For one, you have witnesses witnessing her clearly running for her life from this all male group. You could easily report that alone, she also ended up getting really REALLY hurt running away, to the point everyone had to stop and be like ''Oh crap''. Secondly, if SERIOUSLY questioned by a police officer, they could easily get the girls of the class to testify to everything the boys in the class did. The teacher may be hard to get in the spotlight(Not sure how protected teachers are in Japan), but these kids simply would not get away with this the way they did. I am not saying they'd be put on deaths row or anything, but they got off scot-free! We're talking about an army of more than 10 boys chasing a naked girl through the school halls, have schools degenerated so far over the years that this becomes a common, and completely non-exaggerated happening?
The rest of the bullying in this story, I can completely understand, but that spoiler is the one thing I simply cannot fathom seeing in any real school, and even if it did happen, it would not happen without consequence. I'm not sure how the media works in Japan, probably wouldn't make such a big deal about it, but if that happened over here, parents would be calling for those kids heads on a platter. I mean, I'm sure many of the readers were very happy to see them die horrible deaths by falling off a bridge on a bus.
EDIT:
Spoiler for Further argument.:
To further this wall of thinking, the boys in question clearly don't give a damn about how discreet they are about it. They're completely convinced there is nothing wrong with this, they would probably themselves confess to the cops in an arrogant way, or at least be so blatantly obvious about it that everyone would know. It is also shown that the students are well aware that the specific class she was in is full of ''A class of many bullies''. They're willing to perform public destruction of property to vent their anger of not being able to torture a classmate, this is extremely illogical and would never go unnoticed the way it did. I am also sure that given serious action, these kids wouldn't be brave enough to keep their mouths shut. A girl in a bathroom stall was enough to scare the ''supposed ringleader'' shitless for many days into never bullying her again, when faced with actual authority I highly doubt the entire class would be able to put on a dumb face, the girl also clearly shows signs of being tortured, it's clear she has a bully problem, you can probably find her belongings absolutely damaged by the bullies....this wouldn't WORK. She possibly may not report this, similar to something Marie did, and this could all be explained. But this instantly bullshits the revelation that she needs to fight bullying.