I have a Facebook account, but I am unsearchable and I have no friends.
I signed up for it to become a "fan" of various places where I like to spend money -- so far, vacation spots and local businesses. Now I've added Mobile Reads, so I guess it is more accurately Places That Encourage Me To Aquire More Things.
Edit: Apparently I am searchable, but I've left my entire profile blank so hopefully people are discouraged from seeking me out.
