Well it's interesting that you are willing to accept that. Have you asked everybody in your address book if they want their personal data on facebooks servers and using them for who knows what? In fact that's the biggest point for me in criticizing WhatsApp.

Or what do you think, would the customers of a pornsite or a panama bank think, if the site/bank decides to publish their "address books".

It's a no go for me, that WhatsApp collects data from persons, who haven't agreed with that. And I wouldn't call that the right direction.