Opposite anecdote: car was broken into to steal the stereo (yes its been a while ;)). The door lock was damaged and wouldn't close any longer.
A day later the car was broken into again. While the lock was still broken and no stereo in the car. Someone smashed in the side window and left the door ajar too. Nothing got stolenthat time around.
The one time I had my car broken into was in a nice quiet town with low crime. But I was on a not-so-great street. Crime is pretty localized. Most criminals don't go very far out of their way.
