[justabystander]

> Any evidence of FB going directly against their privacy rules

Whether or not they go against their own rules is a moot point, given their history of changing those rules and systems with little to no notice or documentation.

They've modified privacy multiple times and changed defaults so as to trick users into sharing more than intended. There was an article not long ago about privacy implications of sharing links in the messenger, as they store links in such a way as to track the history of unrelated people who also shared the link. Not to mention various issues with undocumented collection of private data on mobile devices.

Facebook isn't really a company deserving of third-party defense in the arena of privacy.