If I ever put a vanity license plate on my mountain bike, it would say..................
"2NDCLASSCITIZEN" (because I don't have a car).
Speaking of not having a car, would it be vain if I carried a license plate around with me and put it on the back of each bus I get on, just so I could feel like I'm part of the "Vehicle Owner's of the World" club???
If that would be legal, my "portable bus license plate" would say....................
"WHOAMIKIDDING-IAMSTILLA2NDCLASSCITIZEN"