Facebook knew of secret data harvesting for TWO YEARS but did NOTHING to alert users

After Facebook learned about profiles that were harvested in 2014 by the political data firm, Cambridge Analytica, the social network sent a letter in 2016 to Christopher Wylie, who has since left the firm, to delete the user data it acquired.

 

http://www.dailymail.co.uk/news/article-5514623/Facebook-knew-illicit-profile-breach-2-years-didnt-tell-users.html