For most people, the thirteen years from age 19 to 32 involves a great deal of maturity and in many respects I imagine the same applies to him. But if he started out as somewhat unscrupulous, what evidence do we have that the pressures of having to appease investors is going to change that in a positive way when it comes to people's private information? Especially considering the kind of revenue that data can generate.
> 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.