Although there will always be doubts about sharing information with Facebook especially if you do not use Facebook directly, the main cause of the recent controversy of the service WhatsApp with the public was "we decide and we order".
He said little about the exact purpose of the change, the nature and limitations of this data sharing policy. After a lot of delays the company tried to review and finally give up these terms.
Η WhatsApp initially stated that it planned to limit functionality over time until users accept the new reality. The harsh criticism forced the company to renew the new ToS (from Terms of Service) and eventually make it optional, except for messaging companies that use cloud providers. In this case, users will have to agree to these terms before they can even send messages to the business.