Facebook bug set 14M users' sharing settings to public
Of note here, which has always been true, but worth remembering: Facebook can change the visibility of your posts however it likes, whenever it likes. The only thing stopping them is their own ethics. (And possibly a big fine in Europe, but that will be cold comfort to anyone whose personal info is exposed thus.)Not that it _did_, but it certainly could, and will do so if it thinks it has good enough reason.