Didn't work for me. The text of the article spilled off over the bottom of the white overlay panel, and then catastrophically collided with text underneath.
I agree with opt-in rather than opt-out. default into a safe/secure state is a basic principle of computer security. This is why Google Buzz's automatically adding followers was an awful idea, no matter how convenient it seems for users.
But the ISP controls data transmission, not storage. The ISP can't go sell your private information to someone, short of logging packets and extracting the data, which they have no authority to do. The point of distributing social networks is moving control into the hands of users rather than big business, and this makes sense because social activities off the net operate this way.
Why deactivate? I just went straight for deletion. The only problem is I have to wait 14 days and will probably accidentally log-in, reactivating my account, and have to start the countdown all over. But, I have a solution which involves editing my hosts file to redirect facebook.com to wikipedia.org.
I rely on coffee to keep me awake in early morning class, but during quizzes the jittery feeling does impair my ability to focus. However, it's great when I'm pounding out circuit diagrams and equations for EE!