Facebook should create a "People Control 101" course for aspiring tyrannical Dictators/Regimes. Lectures include:- The Power of Defaults, Quagmire of Conflicting Settings, Constant rule-changes to befuddle the masses etc.
Differential Privacy is now $AAPL's licence to collect more "anonymised" personal data & benefit. Such personal data collection is not an evil anymore. I'll have some of the "PR" they're having!