scarlet letter
n.— «The two proposals that have received the most attention—both introduced by Senator Levy—call for a study of the possible issuing of “scarlet letter” license plates to people convicted of drunken driving and the possible seizure of cars of people arrested on a charge of drunken driving.» —“Further Measures To Curb Drunken Driving Studied In Albany” by Susan Chira in Albany, N.Y, New York Times May 3, 1983. (source: Double-Tongued Dictionary)