Man, that really sucks..
Glad I in park in a garage next to my bedroom window every night and a secured parking garage at work.
No place to park on a street in my area anyway. Homeowners association will harass you.
I have had something like that happen to me in the past though, someone painted a big gold stripe (spray paint) down the side of a brand new Grand Prix I owned back in 86, fortunately the car got waxed every weekend and there was so much of a waxcoat on it, the paint literally washed right off.
Had some moron cover my brand new truck with eggs, that was a lot worse than the paint. The force of the eggshells hitting the truck "cut" the paint.
Both incidents appeared to be random trashing as it happened when both vehicles were brand new, envious assholes I guess.
-lyserjic