I was watching a show last night about this guy in Colorado who basically had his life ruined because some facial recognition software was used to examine security camera footage of a bank robbery and pegged him as the robber, even though he had an airtight alibi. It wasn't until the bank teller came in during preliminary hearings and told the judge that there was no way this guy could have been the robber because he was so much taller than the actual thief that the guy was finally released. However, by that time he was pretty well screwed, especially being a financial services industry worker.
The most interesting part of the show, however, was a brief discussion of that Russian app called FindFace, which apparently is starting to become a real problem in Russia. Basically, you use your cellphone to take a picture of someone you see, then plug that picture into the app. The app searches social media sites and in short order will tell you pretty much everything you need to know about the person. Extraordinarily handy for stalkers and thieves.
Won't be long until that hits here.