WhatsApp sued on allegations of sharing user data without consent2
Apparently, WhatsApp also sends the phone numbers of users' contacts to Facebook, even if they aren't WhatsApp users. Which sounds like a pretty big "no-no." Moreover, WhatsApp users who opted out of Facebook's programme of using user data to target ads and suggest friends are given no option to stop sharing data entirely.
In September, government bodies ordered Facebook to stop collecting and storing WhatsApp user data in Germany, and December saw the European Commission accuse the social network of giving "incorrect or misleading information." Now, the Federation of German Consumer Organizations is asking for an injunction to stop data sharing and make Facebook delete all data from German WhatsApp users, accusing the companies of abusing users' trust.