Exactly. I wouldn't be surprised if they are doing it already. (Not Nielsen, but maybe some Cambridge Analytica wannabe startup.) No one would ever know.

But it goes deeper than just some data mining company. All governments, all corporations, all advertisers, all underworld, all stalkers, serial killers, sexual predators - everyone has all access to all your data. And there's not a damn thing you can do about it.

Even Orwell didn't see this coming.