The government requires drivers to keep license plates on their vehicles to protect public and private safety. Commuters are opting to ride bicycles over driving cars for any number of positive lifestyle benefits, but cyclists trade off the safety afforded to drivers.
License plates are not required by law for bicycles in most areas, but there are various benefits to implementing this measure to protect cyclists in reckless riding behavior. Several American states have attempted bicycle license plate systems on a provisional basis, as documented.
Whether you are a leisurely bike rider or consider more of a passion, all riders should be in the habit of regularly cleaning their bike. Simply put, a clean bike looks betters, operates better, and will last longer.
Even if you are using your bike just to cruise to the beach or around town, Bicycling.com recommends, "Cleaning your road bike monthly (or every 20 to 25 rides) and a mountain or 'cross bike more often". So, while it may be easier just to put your bike back in the garage after a few rides, making an effort to wash your bike monthly (even if it doesn't look dirty) can really help extend the life of your bike and help with day to day operation of the bike!