AdvertisementThumbs Down: Facebook Finally Will Add A 'Dislike' MechanismSeptember 15, 2015Christopher Dean HopkinsfacebookEmailThis thumbs up or "like" icon at the Facebook main campus in Menlo Park, Calif., may soon have a neighbor. Founder Mark Zuckerberg said Tuesday that the social network soon would test a long-requested "dislike" type of button. (AFP/Getty Images)