I started reading the article, but immediately realized that the author is not aware of the self-selection bias problem. So I stopped. You cannot opine on such things without first acknowledging the issue of self-selection.

In regards to FB, I absolutely love it because it makes me findable on the web, and I have recovered the connection with my friend whom I have known since age 4, but lost touch with in 2008. She found me in January. The connection is REAL - we now talk on the phone and I will visit her in May (she lives in Chicago). The FB was used as a TOOL to reconnect. This girlfriend found ME, via FB. I myself have found an old friend, whom I lost touch with in 1997 (have already visited her in another state and talk on the phone etc. - so the connection is REAL and FB was used as a TOOL but not as a substitute for a REAL connection).

I have tinkered with GMAIL to filter out alerts about posts, photographs, and all kind of stuff that I am not interested in, in an effort to save time.

In other words, FB is a tool that can be used selectively to your advantage. Nobody is compelled to read posts that they do not want to read, etc. FB has lots of capabilities (I am not aware of most of them), so it should be possible to selectively use the beneficial capabilities (whatever they are and that would vary from user to user) while not wasting time on useless or harmful capabilities.

I can see though how someone would find no capabilities beneficial and then decide to delete the account.