Zuk's done great job of making Facebook appear benign. Bet he'd prefer this wasn't in public domain:
#1:
https://www.theguardian.com/politics/2017/feb/26/robert-mercer-breitbart-war-on-media-steve-bannon-donald-trump-nigel-farage
#2:
https://www.theguardian.com/technology/2017/may/02/facebook-executive-advertising-data-comment
#3:
http://money.cnn.com/2014/06/30/technology/facebook-mood-experiment/index.html