Facebook fires back at former exec who says it's 'ripping apart' society

Facebook is hitting back at a former executive who blasted the company for "ripping apart the social fabric." Chamath Palihapitiya, Facebook's former vice president of user growth, told CNBC this week he feels "tremendous guilt" over the way the social network manipulates its users' brains, saying his children are "not allowed to use this s--t."...