On instagram a friend of mine has posted a group photo in which I'm also a part of, however i wasn't using Instagram and i wasn't tagged. Is Facebook's facial recognition still a threat to privacy in this case too?
@jonah Can you help me? I'm new to this whole privacy thing and a bit confused.

In public places excluding protest sites such as shopping malls, metro transit should i wear glasses that emit infrared light to prevent facial recognition technology in CCTVs from scanning my face?