A document obtained by government watchdog GovernmentAttic.org through the Freedom of Information Act shows over 68 pages of banned vanity plates under Washington, D.C. law. The banned plates range everywhere from supporting the local baseball team to espousing libertarian values.
Among the banned plates are several religious messages such as "4CHRIST," "GODBLES," and "GODBLSS." Anti-government plates like "TAXKLLR," "TAXRUS4," "GVTSUX," and ANTIIRS" are also banned.
The D.C. Department of Motor Vehicles has also banned messages with political figures, such as "OBAMA," "BARACK," "OBAMA44," "OBAMA08," "BUSHSUX," "BUSH1," and "RONPAUL." No party stances either with "GOPSUX" "FTHEGOP" and "GODEMS" making the list.
I would come up with new ones that have not been banned yet. Just for the sake of the protest.