Automated facial recognition is a serious privacy concern, it's not just about the slimy despicable thing facebook is. For example, in the uk where there are more cctv video feed than people to watch them, an automated facial recognition can track you around constantly. Their current automatic number plate recognition is already a serious privacy concern.
Remember 7th cube's voyeur's dream[1] released in 2005? the same but with more camera now being able to identify you based on your facial features. [1]: http://www.pouet.net/prod.php?which=16410