Facebook has been on a third-party app blocking spree as of late. Just days ago it created waves on the social media front by banning the Russian-roulette-inspired game, Social Roulette, an app that encouraged users to take the chance of having their profile pages deleted on a whim. Before that, we've seen the company exclude a series of other trendy programs from accessing its API—citing some of the most questionable and unscrupulous reasons behind its actions. From messaging services to stalker applications, here's a history of the most popular apps blocked by the social network.