With the email "[email protected]", it doesn't seem likely that it's an unmonitored email address that would have missed the registration, unless it was seen as spam / junk mail.
I always sign up for things like this with my spam account / info. If I really like the service, I just create a new account with real info if there's no easy way to delete the old account.
I deleted my Facebook account about 2 years ago. Want to know how it has changed my life? Well, it really hasn't. Sometimes I don't hear about parties / events, but it's usually just an event that I'd either hear about anyway, or would be uninteresting to me in some way. Other than that, no life-changing epiphanies, no extra productivity, no increased level of smugness. Absolutely nothing has changed, and nobody cares. The author of the article may be concerned, thinking their life will change drastically or they will drop off the face of the earth and have to claw their way back to the top of their perceived social food chain, but they'll learn over time that their presence on facebook also does not matter, and they'll have to find another way to tell the world about their thoughts, and hope that people will sign up for an RSS feed to know when they've made new blog posts.