E-ZPass readers are used for more than collecting tolls in New York.
Law enforcement agencies know a lot about the whereabouts and daily habits of millions of American motorists through the use of automated license-plate readers. Motorists, on the other hand, don't know much about the records police officers have collected through the use of these machines. These records are getting harder to obtain.
Vanity plates are a great way to test a state's limits on freedom of expression, which makes them good kindling for lawsuits. The latest license litigation comes from Michigan, where the American Civil Liberties Union has brought suit on behalf of a plaintiff against the state for rejecting the plate "WAR SUX."