The only year I lived in a college dorm was the worst. It was a townhouse kind of dorm. Four bedrooms, eight guys. Our own kitchen, living room, and all that. Not one of the other guys had ever cooked a single meal. Not one had ever done a load of laundry (what the fuck is wrong with parents not preparing male children to live on their own?). Every one of them was a jock, and they were huge. Now, I'm a pretty good sized guy - 1.86 meters (6'1"), around 190 pounds, not fat. I was the smallest guy in the dorm, and I was in the arts. They decided, without reason, that I was a pussy cry baby. Every time I came in and any of them were eating, they threw whatever food they had at me. Any time they came home at night, they came in my room and punched my shoulder when I was sleeping. They didn't flush the toilets, and I'm the only person that ever did dishes in the dorm. I kept my own dishes in my room, which they found and broke into shards in my bed probably 10 times over the course of the first semester. They made it their goal in life to try to make me cry, who the hell knows why, so they'd constantly insult me, punch me, and try to feed me inedible things.
After one semester, I came back after Christmas holiday, and I had had enough. Even though I had paid for the remainder of the school year in that dorm, I had secured other lodgings. One morning, around 10 AM (while they were all still sleeping of course), I tied all their doors shut. Very well. After they were tied shut, I put 8 or 10 drywall screws through the doors into the frames. They were not going to be able to open the doors from the inside. They were trapped very effectively. I used that time to move out - if I had done it while they were around, they would have tripped me, and broken my stuff (they had smashed a computer monitor once, already).
They all finally woke up, couldn't get out of their rooms, and panicked. They were all on the second floor, they couldn't get out. I know for fact at least two of them ended up shitting in their rooms before someone came and rescued them.
For the rest of that academic year, I went to their house around 8 AM a few times a week and stole all their food out of their fridge. They never figured out who was doing it. The last week of classes that year, I actually make a stud frame, drywalled it, and one night when I knew they were all passed out drunk, I went in, and drywalled over the opening to their kitchen and main floor bathroom. I had matching paint. You couldn't tell there had ever been a doorway there.
To this day, I feel I still owe them. I lived with 7 complete douches for a semester.