Date: Jan. 15, 2010

Blocked for: Violating developer agreement

Those who were self-conscious about being unfriended had the perfect companion app at one point. Defriended allowed FB users to monitor which so-called friends stopped following them by scanning their profile pages for update changes. That was until the 99-cent iOS program was removed from the Apple App Store and blocked from the social network for being noncompliant with “Facebook Platform policies.”