Facebook is a HUGE amount of troubleThey were complicit in election manipulation of the Brexit vote, the US election and Russian oil companies. This guy from BC spilt the beans on his part in it - HE is the smoking gun. Cambridge Analytica is owned by billionaire Robert Mercer (his company runs the world's top hedge fund) who hired Steve Bannon who hired this guy to write apps to control data - your Fb posts are the data. Mercer has been collecting FB user data through apps (you know the ones where you sell out your friends to get the results?) and controlled data of 240 million voters. Faceboot knew and was a part of it. It's too huge to understand through reading just one article but investors need to know. This is why FB was blocked from advertising to voters during the election in France. They knew they were successfully manipulating voters.
https://www.theguardian.com/news/2018/mar/17/data-war-whistleblower-christopher-wylie-faceook-nix-bannon-trump
https://www.newyorker.com/magazine/2017/03/27/the-reclusive-hedge-fund-tycoon-behind-the-trump-presidency