Smelly Jeffrey writes "According to a recent article, Indiana BMV Communications Director Dennis Rosebrough states that applicants for a new or renewed operator's license or state identification card will no longer be allowed to smile and say cheese. Apparently new facial recognition software being employed by the state fails to function when the face is distorted by something as innocuous as smiling. Also on the list of taboos are hats, eyeglasses, and hair that hangs down over the face. The article fails to mention, however, the legality of beards, mustaches, and bushy eyebrows."
Similar restrictions are in place for the Enhanced Driver License
(which serves as a sort of limited passport) implemented by the state of Washington, among others.