I also critiqued the school itself, some of the hypocrisies I saw and notably since it was a Catholic school they had a school rule against pornography even when you were at home. So of course I put up a very soft core nude photo as a sort of fuck you.
However, unlike this story I actually was expelled, but it's not very difficult to get expelled from a Catholic school, it was a regular occurrence at our school. Knowing this I kept it very anonymous and didn't tell anyone.
I got an email from the school saying they would sue me for libel unless I came and turned myself in. That made me pretty nervous and pretty soon after that a student who I knew emailed me saying he loved the site and wanted to help. I then told him who I was and it turns out it was actually a teacher impersonating a student.
My brother and I were both expelled, my brother didn't do anything but contribute a few of the teacher reviews, so it sucked pretty bad for him. For me too of course but I was kicked out halfway through my senior year so I was mostly done with high school anyway. Plus I had already applied to colleges so it the expulsion didn't show up on any transcript the colleges received.
My brother wasn't so lucky since he was only a sophomore when this happened, when it came time to apply for college he got accepted to none of the colleges he applied for. He appealed hard and finally got into one.