This Guy Knows Why People 'Unfriend' You on Facebook

Ever wonder why an old high-school buddy "unfriended" you on Facebook? Ever think it might be because you've aged into a loud-mouthed, super-opinionated boor who doesn't know when to slap a muzzle on it?

Well, perhaps not you personally – but lots of people have been shunned on Facebook due to broadcasting strong beliefs, according to Christopher Sibona. A doctoral student at the University of Colorado Denver, Sibona has spent years investigating the psychology of Facebook. Here's a finding from one of his recently published studies: "The most common reason for unfriending someone from high school is that the person posted polarizing comments often about religion or politics. The other big reason for unfriending was frequent, uninteresting posts."