https://techcrunch.com/2018/05/29/facebook-didnt-see-cambridge-analytica-breach-coming-because-it-was-focused-on-the-old-threat/

In light of the massive data scandal involving Cambridge Analytica around the 2016 U.S. presidential election, a lot of people wondered how something like that could’ve happened. Well, Facebook didn’t see it coming, Facebook COO Sheryl Sandberg said at the Code conference this evening.

“If you go back to 2016 and you think about what people were worried about in terms of nations, states or election security, it was largely spam and phishing hacking,” Sandberg said. “That’s what people were worried about.”