About (leaked) data falling in the wrong hands: Dutch municipalities used to register your religion in the early 1900s. Then the Germans invaded and boom. The

About (leaked) data falling in the wrong hands: Dutch municipalities used to register your religion in the early 1900s. Then the Germans invaded and boom. The NAZIs had a list of every jew in the country and the rest is history. About the incentive you mention: have a look at the facebook privacy incidents. Whether or not this incentive exists, data leaks will happen. The only questions are when, to whom, and what that actor will do with said data.