Another link I’ve been meaning to post for a while: 5 “rules” that might help you tread the fine line between creepy and creative when taking photos in the street. From the last paragraph:
Above all, IMHO use common sense and common courtesy as your guide. Sure – get sneeky, get gangster, get ‘the shot’, but you can do it without being a nut job. Plenty of other photographers have done amazing projects in the streets that are in your face, against people’s will and without warrant. My suggestion? Leave that to somebody else and focus on the pictures that you want to make through respect and hard work.