> but however sexy that sounds from technical point, they are after all a public company and need to play by the rules. Unlikely to take on such a massive intrusion of your privacy, knowing that eventually it would get discovered.

You completely lost me here. We’re talking about Facebook, the company with a near infinite supply and history of privacy issues. Facebook has shown that rules don’t apply to it for as long as it can get away with it. Behind the scenes, it laughs at fines imposed by governments because they’re too tiny to have a material impact on the future of the company and its earnings.