[DominikR]

I believe the picture solution could be entirely automated.

The text on the card could be read by OCR technology and Facebook already is capably of matching your face to your account.

Edit: After thinking some more about it I came to the conclusion that it would be too easy to fake such an image. Anyone with internet access and MS Paint could probably create a fake within 3 minutes.

Also - I'm not sure that it would be a good user experience.