Let it be known that putting that kind of stuff on the student's car is NOT OK. A locked car cover may be helpful (would it help with the stuff in the wheel too

Let it be known that putting that kind of stuff on the student's car is NOT OK. A locked car cover may be helpful (would it help with the stuff in the wheel too? even if not, put your own locked cover on the wheel) (it would also prevent people from putting papers in the wind shield, I think). But nevertheless the students should pay the fine for parking if they wish to park their car in the parking space that requires payment. If the fee is too much then they should file a public complaint with the owner of the parking lot.