Respect for your privacy is coded into our DNA, and we built WhatsApp
around the goal of knowing as little about you as possible [...]
If partnering with Facebook meant that we had to change our values,
we wouldn’t have done it. Instead, we are forming a partnership
that would allow us to continue operating independently and autonomously.
Our fundamental values and beliefs will not change. Our principles
will not change. Everything that has made WhatsApp the leader in
personal messaging will still be in place. Speculation to the
contrary isn’t just baseless and unfounded, it’s irresponsible. [0]
Well, good news for them. They never outlined what exactly their principles were, so they weren't technically lying. We just get to see how thin their principles (retroactively) turn out to be.[0] https://blog.whatsapp.com/529/Setting-the-record-straight