These are the horror stories that make me shy away from getting another nice car. People look for nice cars and damage them. I have had that experience myself when I had my Mercedes. There is a lot to be said for driving a car that looks like everybody else's. It makes them invisible when you park.
I am sorry to hear about your incident,I have one scratch on my car and it bothers the living day lights out of me. I could not imagine my car being keyed.