special-cause plates? you've got to go!
"The supreme court has considered the issue of slogans on number plates before, albeit as a matter of the right not to drive with one. In 1997 it ruled that the government of New Hampshire could not force George Maynard to drive around with the state motto Live Free or Die. Maynard argued that, offered the choice, he would prefer not to die 'even if it meant living in bondage.'"
Full article here.
Full article here.