It's like trying to give instructions to the two guards in The Holy Grail, Facebook Privacy that is.
Facebook: “Okay, we'll reveal all of your private information to all web sites you visit!”
Me: “No, please only reveal my info to my friends.”
Facebook: “Ah, okay, we'll only reveal your personal info to your friends, and to our advertisers and all web sites you visit!”
Me: “No, no! Only to friends I specify!”
Facebook: “Okay, only to our advertisers and your friends. And we'll reveal your Events to everyone!”