Re: Jim Dixon's comment, before the university world canned me (er, I mean, offered me a well-deserved early retirement)we had the same problem with student photo-library cards, one had his dog's photo on! Another girl in a full burkha (and a broad Birmingham accent) always kept her thumb over her photo and would only show her picture to female staff members, I often wondered how they knew it was really her at exam times.
As the UK govt is now talking about a national ID card, I wonder if they've considered what they'll accept, gruning, bunny ears, photo in burkha or Scream mask!

RtS
(better looking in a mask!)