People over-do things when given the chance. From "Trading Spaces" to MySpace, some people just don't know when to quit, and now, with Facebook Apps, people have one more outlet for their spoiled creative juices.
My request: let me completely block apps I hate. Someone on my friends list has 40 apps. Please Facebook, just let me block every mention of "Zombies," "Superfuck requests," "Gifts" (Facebook or otherwise), and anything else I might feel like never seeing. Let the Facebook whores have their fun, but let the rest of us live our empty online lives.