Richard Parker cars have license plates for more than tax purposes, to prove ownership and for the public to report drivers who are a danger and don't obey laws. I believe bikes are a good form of transportation, until cyclist think they own the road the right of way and create a danger to pedestrians by using the sidewalk as if it is a sidecycle. It would be great to be able to get a plate number of abusers to report the dangers. Dash cams and cell phones catch a lot of vehicle problems. I know cyclist who don't like the way people act towards them but admit it is because many cyclist are a danger or asses. Those who have vehicles that require gas pay a tax to help with road maintenance the same road cyclist use so why not share in the cost and be identifiable.