Facebook will disclose to Alice a list of all people who have Alice in their contact list on their phones (and use the Facebook phone app). I was told by Faceb

Facebook will disclose to Alice a list of all people who have Alice in their contact list on their phones (and use the Facebook phone app). I was told by Facebook engineers that this is working correctly. HN discussion: http://hackerne.ws/item?id=3145857 http://hackerne.ws/item?id=3145857 There have been other things, but most of them were fixed rather than being called features.