Facebook did A/B testing on psychological effects of their products a decade ago and people are still up in arms about it: https://www.nytimes.com/2014/06/30/te

Facebook did A/B testing on psychological effects of their products a decade ago and people are still up in arms about it: https://www.nytimes.com/2014/06/30/technology/facebook-tinkers-with-users-emotions-in-news-feed-experiment-stirring-outcry.html https://www.nytimes.com/2014/06/30/technology/facebook-tinke... Doubt we’ll ever see them do it again.