18. The Tea Party
A.k.a. "The Worst Human Beings Proportional to How Much Political News is Still Devoted to Them."
Why? Because we should just call them what they are: racists, idiots, and cowards who take extreme action for no other reason than to draw attention to themselves as a "movement." They're as much a "movement" as people who suck helium from balloons and try their best Steve Urkel impersonations, which is to say: Loud, ignorant Americans, and nothing else.