The Reporters' Committee for Freedom of the Press has produced a fact sheet on privacy for photographers. I don't know when it was first produced, but it is an interesting and handy guide to the principal privacy torts in the United States:
Photographers' Guide to Privacy:
"Celebrities, politicians and other sought-after sources of news would appear, by their routine claims that members of the media have violated their privacy, to understand precisely what is private and what is public, or newsworthy, information.
Journalists, however, often possess different notions of privacy and newsworthiness, and know that the question is more complicated. Reporting news stories in a way that serves and informs the public will often entail publicizing facts or displaying images that will embarrass or anger someone...."