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Thanks! I tend not to focus on photographing people. I'm more fascinated with the environment that is NYC than the people who are in it. Though I do from time to time run across interesting people.
Also, several of my recent posts are from Midwood, an orthodox Jewish section of Brooklyn that I was working in. The Lubavitcher and Chabad Jewish population in these areas generally do not like to be photographed. They have sued journalists for photographing them, and confronted tourists and other private photographers for same. I respect their wishes in this regard. Nobody owes it to anyone else to be part of a photograph, whether for art, journalism or novelty. Some street photogs take the stance that anyone in the public arena is game to be photographed, as under US and some European laws this is technically true.
This may get you off the hook legally, however I would rather err on the side of respecting an individuals right to privacy, even when walking down the street. If I do capture someone in a photograph and they ask me to delete, I always comply.

I guess I had my coffee this morning?