Really makes you lose faith in humanity.
we did this too.In high school, we used to pick up a guy's MG and just "twist" in the parking spot so that he couldn't pull out until at least one of the cars beside him left.
He always tried to park amongst the football players' cars and talk about it like it made him cool.
We didn't have special parking spots or anything. We'd just end up parking near each other because we showed up around the same time.
...and we left late because we had practice after school. Sooooo... he left late too.