I love taking pictures, but I do not often take them of strangers. If its an interesting scene they happen to make or be a part of, and I'm at a distance, I might. Otherwise they might pose and ruin the moment. If I am close I always ask if they mind. I do that every halloween, and it's never to make fun of anyone. Only because I find it/them/their costume interesting.
Taking pictures of strangers and posting them to belittle is immature and unkind.
When I hear terms like "hipster" I think, who told cliques they could leave high school??