Now here's a scary thought. This website: "www.RFID2VIN.com" proposes the use of RFID chips that would be left at the scene of "hit and run" accidents. According to their email to me, these unique identifiers would then act as a sort of "automotive DNA," providing the registration information for that particular vehicle.

I perused their website very quickly (could use a web designer IMO) and it appears this involves embedding RFIDs in the paint, bumpers, headlamps, etc. Then when you get into an accident, the RFIDs are dislodged and left at the scene which can be used to determine the car's position at the time of the accident to determine fault, as well as whose car it is in the event of a "hit and run".

I'm sure the ACLU will be all over this...