Ethics in Street Photography is a hot topic which everyone discusses at a certain point. After all we photograph strangers without asking. Spontaneity and real life are the topic of street photography.
Bruce Gilden is infamous for his style of mugging people with a flash gun and recording the reaction. His apologists usually argue that he is entitled to do that because he is such a great artist. I completely disagree. Nobody is entitled to harm over people in any way. The wellbeing of a human is more important than art. I do not like such pictures.
Also I do not like voyeuristic pictures of sexy girls who are completely unaware of being photographed and in which sexiness of the subject is the only thing which makes the picture. Or any pictures which show people in embarrassing situations. This includes particularly photos of homeless and beggars. As they are usually powerless and can not easily defend themselves against intrusive photographers this is really bad taste. It might be different if a professional documentary photographer takes such pictures. In my opinion it is very important to separate artistic street photography from documentary photography.
Here are my personal rules for taking pictures of strangers and publishing.
1. I am obvious and do not hide. The girls in this picture saw me with the big Nikon DSLR and did not turn away. They seemed to be proud of their great looks in this light and this leads to the next rule.
2. I want that my subjects look awesome and my very best to let them shine. I want that they are proud if they ever stumble upon their pictures.
3. Whenever possible I anonymise. A silhouette can tell more about a situation than a detailed face shot. Handscan tell more than full body shots. And blurriness and Bokeh can tell the emotional side as well.