Actually, Facebook Changed Its Terms To Cover That Experiment After It Was Over
<p>As you may know, it has come to light that Facebook <a href="http://www.webpronews.com/did-facebook-cross-the-line-this-time-2014-06">ran an experiment</a> with nearly 700,000 users in 2012, showing how it could manipulate emotions by showing users more positive or negative content in their News Feeds.</p>
