Car-sized Jokes

My brother used to be a police officer in Chicago. (He's now a rather
high-up muckity-muck in the police dept., but that's beside the point.)
He's told me some amusing anecdotes from Chicago police-work.
There was one story about people shoveling the snow for a parking space
in front their house. This apparently is a problem for the Chicago
police every winter. What happens is that somebody will park in a
nearby parking lot, then slave away for how ever many hours it takes to
shovel out a car-sized space in front of his house, naturally so he can
park his car there. Then he goes back to the lot to get his car.
When he returns home, he finds that the space has been taken by some
_other_ car. He is, well, upset.
What most people do is write nasty notes etc. and place them on the
windshield of the offending vehicle. Where the police get involved,
however, is the occasional case where the individual vents his wrath
in somewhat more more...