Freaky deaky, and not cool..
You find him again, you smack him in his face and tell him to fuck off. Tell him that you got his picture and that you will post it everywhere in the internet and that he will be known to everybody as the creepy guy with a questionable hobby. I would love to do it for you but I am far away from TS.
He looks ya creepy
It's their own fault for being in public