Hay jforce:
My parking spot is next to the local police station. Also, I'm a 5th degree Black Belt (not bragging). I know this won't pretect my car 100% but it might make a difference.
www.longviewkungfu.com
You can see the station to the left of my school in the picture. I get the covered spot next to my building. It's the BEST parking spot in town.
Now that you mention it, adding a shock sensor to the alarm might be a good idea. Have you heard of anything like that. Seems to me that an add on is available for the stock system.