What a bunch of fuddy duddies!

"The U.K. Home Office ruled that all new passport photos must show an unsmiling face with closed mouth because open mouths can confuse facial recognition systems. The new guidelines require good contrast between the face and background; the full face looking straight at the camera; no shadows; and a neutral facial expression. The rules will apply immediately to new and replacement passports. U.K. prohibits smiling faces on passports, *The Register*, 6 Aug 2004"