Unfortunately my Middle and High schools were both connected by one hallway. Anything the middle school kids did, we also had to suffer. This included some twelve year old using google to search for boobs which prompted the schools to block google and yahoo image search, flickr, and national geographic. Another time a bunch of fourteen year old girls overdose on their parents arthritis pain pills causing both schools to be locked down for about an hour on a Friday afternoon shortly before the day ended. No one could leave, even if they had a car. Some idiots pull the fire alarm five times in one day, it was never figured out who did it. All those incidents happened during my senior year in High school.
Supposedly about twenty years ago someone slipped acid into the coffee of one of the teachers, and now that teacher is the vice principal.
My graduating class had a pretty good senior prank that involved taking the desks from the history and english wings and putting them in the cafeteria. That pissed off the principal who was new, and he threatened that if anything else happened, there wouldn't be a graduation ceremony.
Other than that nothing much, except when I was in first grade a boy in my year died when his house burned down, but I never knew him, and some other incidents involving some people from my high school and drugs, but that was after they graduated.