Shaking my head. Shaking my head. These forums have so many good ideas that we're bound to have a terrible one such as this. Bitcoin is supposed to be Anonymous. If you link your bitcoins to Facebook, you're pretty much wearing a "Hello My Name Is" sticker whenever you trade! Not desirable.
Then when you buy some bitmunchies - guess what! - your facebook status updates to "Just bought some slimjimmy bitmunchies for 1.57 BTC". Invasion of privacy. And then when you go to MtGox, you can't escape. Facebook will update again: "Just sold 45.2 BTC at $14.3 each. My MtGox password is 'qwerty7', my SSN is 1438-13-8765, and my credit card is 4638 1357 4875 4682"
This is what you believe and desire, and you are insane for thinking this way.
Bitcoins have the ability to be anonymous. They are not *supposed* to be anything. You are jumping to conclusions.