Date: Feb. 23, 2011

Blocked for: Being too popular

After securing over 100,00 users within a 24-hour time span, the relationship status tracker was removed for its mass popularity, enraging stalkers and jilted lovers across the net. The reason given to creator Dan Loewenherz : “If an application is making an inordinate number of stream, publish calls and receiving a large number of user reports, it may be removed by our automated systems to protect the user experience and the Platform ecosystem.” That's a tough breakup to get over.