The Bureau of Motor Vehicles of the State of Indiana has taken steps to reduce the number of complaints stemming from the long lines. Their method? They removed the clocks from their branches.
Of course, that would kind of assume that people don't have phones or watches. Heck, even one person can leak the information to all others by answering the question, "Do you have the time?" Obviously, the next step would have to be the banning of such items from the offices.