The O'Reilly defenders' responses basically go: "But one is tabloids taking pictures and the other is investigative journalism!"
Except of course there's no journalistic value in harassing some guy for hiring a liberal, or Jolie for not giving Fox interviews. Its no different than the "journalism" Bill did for Inside Edition. And even if he were seeking answers to important questions, you don't get them by interrupting people taking out the garbage. The point is to humiliate and harass, not get a real response.