Is Facebook listening in?
According to Business Insider, "There's a widely held belief that Facebook uses smartphones to listen in on users, and then serve those users advertisements based on their speech. Facebook has repeatedly denied doing as much. Despite those denials from Facebook, and evidence from experts to the contrary, the belief is widely held and seemingly unshakable." This belief started back in 2014 when the Facebook app was able to identify songs playing around it's users.