How far are we from having sufficient facial recognition technology that we could clip a photo like this, drop it into Facebook image search (or whatever), and the person would come up? Is that feasible with today's technology?
One problem is the databases of tagged faces typically have passport style photos and not sides. It would be easier with 3d type data of faces, like when we start using depth cameras at the DMV too. Or, we will develop sufficient methodology to figure it out well enough from the existing photos... depth from a single image.
It sounds sort of disturbing to me. Google reverse image search for faces... that team has done it or could do it easily. But privacy.
You have lots of other information, so you don't need to check every human on the planet.