i made a thread like this that was closed because of some vulgar stories but let me post mine
freshmen year there was a dodgeball tournament between the seniors and the whole school was in the gym, and it started to get out of hand. the dodgeballs were flying everywhere and hitting people, one even hit an older teacher right in the face. our principal got on the mic and said it needed to stop because it wasn't safe, and everyone started booing her

so our vice principal took the mic and SCREAMED at all of us, and called us ungrateful and spoiled, and told us to go home (which wasn't really a punishment tbh)
my sophomore year me and my friends were suspended for 3 days for sneaking out of a hotel on a school trip
a police officer caught us, and was going to "take us in" but we explained to him the situation and he drove us back to the hotel and made us explain everything to the teachers on the trip
junior year 4 kids were arrested in the middle of school for beating up a kid in the locker room after football practice, the local news was all over it, and the kids were later let go, and there was a minor controversy because people thought they were let go because they were rich, and if they were poor they would of had to stay in jail, but the kid who got assaulted apparently lied about some of his injuries, and the doctor said there weren't enough injuries to press charges.
senior year there was a bomb threat, which isn't really that big of a deal with a lot of schools, but it was the first time ever for our school, so it was the year scandal. they never found out who did it, so whoever did it got away with it, but one of my friends made a joke about it, and sent it to his now ex girl friend, who told the cops about it, and they questioned him, and the principal said he would of been expelled, but we only had 2 weeks of school til graduation so she let him go