As I understand it (and IANAL) there is a pretty well-established legal distinction between people whose job or avocation inevitably involves being famous and noticed, and just ordinary citizens. If you become a politician, singer, actor, etc. it is assumed that your expectation of privacy is different than for most people. Again IANAL, but my understanding is that just because photographers are allowed to hound famous actors, doesn't mean they can do it to someone who isn't newsworthy or otherwise in a public profession. IANAL.