As someone who uses the internet in a healthy way and healthy dose, i think this article is like when an (former?) alcoholic suggests to all the people to not even drink one beer occasionally. Seriously why should I not use email to communicate with people far away from me on interesting topics? Why would I not look up things in Wikipedia? Why would I not look at Fecebook once a day for 2 minutes to see whether there…
you can of course use it as much as you want -- but I thing the broader point of the author holds: for a generation that is supposed to be rebellious, there is a surprising amount of conformism in accepting these tools as something that need to be used all the time.
That said, I'm with the author in one respect: I don't have a Facebook account and never will. Constant connectedness is the enemy of deep understanding of the world -- although drugs, pinball machines, and basking in one's alleged superiority to the squares are also its enemies.