I froze my overdue library book before returning it, cause the library froze my account due to previous late return fees. They charged for the whole book saying it was ruined. I tried arguing that I was doing them a favor by preserving it like they did Walt Disney. They didn't find it amusing.

I don't suggest you do this prank on your public library, but... next time you pay a parking ticket, freeze your check, put it on some dry ice, put it in a little styrofoam container, and send it in.  That'll show em... sort of.