How Grabby Are Your Facebook Apps? source @wsj
The original article is from WSJ and is called Selling You on Facebook and looks at many popular Facebook apps which are obtaining information about users and users' friends with the SHOCKER untone “so don't be surprised if details about your religious, political and even sexual preferences start popping up in unexpected places.” And is the extension of a long running series and viewpoints call “what they know”
The WSJ has done a nice interactive page that allows you to see what data could be taken, depending on what you have agreed to. The upshot of this is that Facebook is not Free, Your Data has value and the whole UI/UX around privacy and its settings is a mess.