A 13 year old girl....
...or someone with a social life beyond the few 'friends' you have on IRC where you spend your evenings spouting tired internet memes? See, two can play at generalising.
There seems to be a lot of unfounded bitterness here directed towards Facebook so lets get some things straight. First off, not using Facebook does not make you superior in any way, it just doesn't. Sure, Facebook isn't for everyone and if you don't like it or don't have a need for it there's nothing wrong with staying away. However, if you're sitting there right now with a smug sense of satisfaction because you're not a member of the 'ignorant masses' who use the service, then I really suggest you take a deeper look at your self because you've got some nasty issues going on.
Second, everyone here is well aware that Zuckerburg et al want to harvest as much of your info as possible and sell it on. What baffles me is that a lot of you seem to be under the impression that the vast majority of other services on the net aren't also trying to do this. You wouldn't post under your real name on a forum, you wouldn't post your address or national insurance number in a public chat room, yet you assume you have to enter all of your personal info into Facebook to use the service. An email address and a user name are all you need, I wonder if you were quite so up-in-arms when El Reg required such details to sign up for an account? I'm aware that there are a lot of Facebook users who will post all their details, nude pictures of themselves and their current location but then there are also a lot of people who respond to phishing emails with their bank account details and you don't blame Gmail or Hotmail for that...