Not me, but a friend. He had absolutely no qualms about pissing wherever he wanted. It almost got his other friend in trouble a few times. He'd go in the stairwell, in the gym (under the bleachers), in the hallways, and once almost got caught pissing in the elevator.
Same friend would also frequently go to the back of the school bus and piss on the back of the last seat. He actually got expelled for that. Crazy guy, though.