It’s a little old,
I have never really put this in to perspective if you think the number of pre-eighteen year olds there are in facebook and other sites like flickr with kindly tagged faces. It makes for a small pool of under cover offices.
Some related I have been thinking about is I wonder if anyone has done any large scale indexing of the faces on the internet. What I mean by that is there is all of these tagged photos with a name and face. You could possible search the internet by face and not just by photo like what Google does now. Oh go try that drag a photo in to the search bar.