Want to tell that driver how bad he is, or tell someone that you really like there car? Try this site on for size, its the Internet Lisense Plate Database. Here is snipbit from the site to help describe it.

ILPDB is a way for people in the real world to communicate in the virtual world using License Plates. License plates are used all over the world to associate a vehicle with a person or business. Now, for FREE , you can yell at that aggressive driver, tell that person that you thought he/she was cute, or even bust them for littering.