I knew I was setting myself up for that one :)
Some of my fellow commuter students and I are passing around a petition begging the campus police to ticket a few of the most egregious violators of the parking policy. The commuter lot has maybe 150 spots, and close to a third of them are always occupied by resident student cars... it's the worst part of the whole school situation.
Sticking a small potato in their exhaust pipe also works. . .
Not a banana? :-)