A good rule for posting Private information to Social Sites is…  Don’t. The online world is constantly changing agreements change technology changes and often the user doesn’t even know until they arrive at the site to see everything in a different spot or your personal info now open to public view because of a change in the sites privacy policy. Here is a flaw that made FaceBook private Photos viewable.  Checkout the story below on the HuffingtonPost.com   Facebook Flaw Revealed Users Private Photos, Including Mark Zuckerbergs Collection.