Quoting from the link: Facebook said on Tuesday, after the order had been issued, that it had complied with Europe’s privacy rules and that it was willing to work with the German regulator to address its concerns. Two Indian students challenged Facebook on WhatsApp privacy policy changes [0]. The following is what WhatsApp counsel told [1]: Using the messaging service is a voluntary decision, we have not forced anybo…
Yes, it is voluntary, but it would be socially alienating not to be on that service. Here's a relevant talk [0] by Moxie Marlinspike talking about that.
[0]: https://www.youtube.com/watch?v=eG0KrT6pBPk&feature=youtu.be...