Facebook's collection and use of data from third-party sources is abusive
Found on Bundeskartellamt on Thursday, 21 December 2017
The authority holds the view that Facebook is abusing this dominant position by making the use of its social network conditional on its being allowed to limitlessly amass every kind of data generated by using third-party websites and merge it with the user's Facebook account. These third-party sites include firstly services owned by Facebook such as WhatsApp or Instagram, and secondly websites and apps of other operators with embedded Facebook APIs.
Users cannot expect data which is generated when they use services other than Facebook to be added to their Facebook account to this extent. Data are already transmitted from websites and apps to Facebook when a user calls them up or installs them, provided they have an embedded API.
It's sadly very rare to see that the government takes steps to show companies that they cannot collect everything about users for marketing and sales to increase their profits.