Facebook, why you so creepy?

I’m always shocked when Facebook shows me people I actually know as possible friends.  I almost never use the site and when I do it’s to get someone’s e-mail address so I can e-mail them directly.  Somehow they populate that list with people I rarely speak to and have zero public connections to.  I mean, I don’t even know of these people through anyone else, so I don’t get how they’re able to suggest them.

Shudder.