Social Fatigue occurs when a person is overwhelmed by being put into far too many social situations for their comfort, often resulting in boredom or annoyance of those around them.
Social Fatigue can result from over-use of social networking sites (Facebook, myspace) or various online forums where clashing opinions can wear out a persons tolerance faster.
Controversial topics such as Politics, religion, or worn out Meme's can further propel the spiral to Social Fatigue.
Social Fatigue also occurs in MMO's (Massivly Multiplayer Online games) where grouping and other social activities are required to make progress in the game.
At some point a sufferer of Social Fatigue just wants to be left alone, because they have reached the conclusion that most people are just plain stupid.
After a forum discussion on Zombies, Bacon...and the conclusion of zombie-bacon, Robert had Social Fatigue and didn't care if the world spiralled in to the sun tomorrow... so long as these people went with it.