You really don't want to mess with the Facebook police. They'll delete your life. I wish I had something more substantive to say here, but the problem is that we give Facebook an extraordinarily huge power in our personal lives. It's not just some random web service.
I 'deleted my life', and y'know what? Nothing changed. I still have the same friends I talked to before Facebook, still meet up for drinks on their birthdays, still arrange nights out, and still share what's going on in my life.
The best thing about no Facebook? I know what information is out there, and nothing personal that Advertising Inc. can buy.