Two stories from a British private school:

A video was spread (no pun intended) of a 14/15 year old guy from a nearby school fingering his asshole and then ejaculating over himself. The story goes that he sent it to his girlfriend who knew he was cheating on her, so she proceeded to send it to basically anyone as revenge to the point where it had been uploaded onto a few porn sites. The police got involved and the guy and his girlfriend were put on the sex offender's list, but that's about all I know (as I say, he was in another school).

Second story - At the end of the previous school year we had an English teacher (female, mid 20s) leave suddenly without explanation. A few weeks into half term the next year documents were leaked by a year 10 student who had hacked into the school system (with very little effort as it turned out) giving him access to all emails, personal files etc. of students and teachers. He found a 21 page statement from said English teacher sent to the head explaining the reasons for her 'resignation' and it turned out she'd been getting sexually harassed by multiple teachers. Some of the accusations were a bit far-fetched but she told of being approached for having a threesome with the dep. head + his wife and quoted a line from a History teacher 'those are some nice "fuck me" boots you've got on today'. The hacker ended up showering himself in glory and was caught and expelled before the end of the day on which the document was leaked. Somehow the dep. head kept his job, but the History teacher was 'asked to leave' presumably facing legal repercussions.

These are pretty mild compared to some of the other stuff on here, which is probably a good thing...