Johnny Law won't be too happy about this, but some honest, hard-working citizens have created an electronic license plate blurring device. At the flick of a switch, the gadget will obfuscate the numbers and letters of a license plate, making it nigh impossible for the long arm of the law to identify you. It was produced for a team in the Bullrun, which is a cross-country race that's currently ongoing. Granted, this is probably not looked upon too kindly by law enforcement, perhaps it's even illegal, but laws are silly things anyway.

Bullrun Tech, Subterfuge Edition: Electronic License Plate Blur Effect [Jalopnik]

Bullrun Home Page [Bullrun]