This report was on Channel4 news today about Facebook data, the US election, Steve Bannon etc. Interesting viewing:
Cambridge Analytica: Whistleblower reveals data grab of 50 million Facebook profiles
https://www.youtube.com/watch?v=zb6-xz-geH4
The company, Cambridge Analytica, was suspended from Facebook on Friday.
Both Facebook and Cambridge Analytica deny any wrongdoing.