I read about a man being caught on camera deliberately scratching an Aston Martin [nbcnews.com] a while back. While it was amusing that the man was caught in such a detail on the camera, the act of vandalism I brushed off as a "rich man's problem." That was until today, when I notice someone quite deliberately scratched up my 2010 Nissan Sentra. Accepting that I have very horrible neighbors and will move when I can, does anyone have any ideas for a good DIY security system that can produce results similar to the ones in the Aston Martin incident?