We have discussed these things here on TPF several times before, though so far we have never had anyone who was "the victim" of some candid photography finding his photo displayed in the internet like that.
What I have learned is that apparently in the States photos may be taken of anyone as long as the persons are in a public place, and can also be published as long as the photographer does not make any money out of this. (Rules are stricter in Germany but equally little enforceable, really).
You may sue the photographer and ultimately even the social network provider, but you may in the end only lose money and not win anything.
Though I do see where you come from, and I detected a photo of a person who I know (from sight) on the website of one of my daughter's classfriends (a crop on his face only out of a larger image which that boy had found elsewhere in the internet, and with a totally different context). That person shown is an elderly man whose facial features no longer go as "handsome" or "beautiful" in the common meaning of the word, and that classfriend of my daughter's put a very derogative word next to this crop of that man's face only, ridiculing the person.
I got one glimpse of that and said to my daughter: "Oh my! I know that man! I know he is no longer 'a picture of a man' but still: that friend of yours must NOT put it up on his site, not like this, not just to ridicule him! He does not have the right!"
Well, she saw my reason, e-mailed that friend, and he took it down, leaving a sentence in the pic's stead such as "Someone took offense out of that photo, so I took it down". Worked fine.
Years ago, however, before the internet became known to the masses and useable for the masses, I had a boyfriend. We watched a documentary on TV on people on the dole (jobless people), and how some just do not WANT to get themselves back into the world of the working people and all that, and suddenly his face appeared on the TV screen, a real and true zoom-in scene from whole body (he was standing in front of a recognisable - by us! - shop window in my home town in a relaxed manner) to his face only, this bit of footage going with a commentary from the off on how some simply do not LIKE to work.
He was outraged!
But ... powerless.
The programme had run and his person was brought in connection with "the listless jobless" (so to speak), even though he was working in a steady job at the time. No one had EVER approached him beforehand to even TELL him he had been captured on film by a film team. He remembered the day when he was waiting for his sister to come out of the shop behind him, it was a Saturday morning, when he was free ... but his protests were to no avail, and later - when only a lawyer could have brought things more foreward for him, he gave up...