> You don't want to be "that guy" constantly demanding that your friends pull down any picture that you show up in, a request your friends will probably ignore anyway, and which will greatly diminish your personal likability.

Mostly because it doesn't work. I've always been that guy, and people still constantly take your picture. There's a lot of money in convincing people that taking and sharing publicly pictures of oneself and everything that one comes into contact with is unbelievably fulfilling.

> I don't really think there's any way around it and I am in fact surprised that people haven't already made a public "search by face" engine. Correlate this data with Facebook or some other all-seeing collections and the technology to dynamically identify every individual that enters a building via surveillance footage is already there. The only thing holding it back now is a) political correctness and b) the practical difficulty of extracting all of this data at a large scale into a format that can be easily cross-referenced. Both of these are permeable and temporary restrictions, and access to the data is already a non-issue for some actors.

https://www.theguardian.com/technology/2016/may/17/findface-...

Its most innovative use seems to be to stalk and harass porn stars, prostitutes, and their families.