That's the irony of the current fear-hysteria over "privacy" and a photographic boogeyman behind every lens -- the same people are either wholly ignorant or wholly uncaring that their public images are recorded surreptitiously on a nearly-continual basis by people with FAR more sinister motives than a street photographer's dedication to documentation.

I'd rather contribute to a street photographer's contribution to art or the public dialogue, than some shadowy marketing agency or security apparatus selling my image for profit or oppression.