If Facebook was a real person, he would tell you who your other friends should be. What "gifts" to send. Who you should talk to.
He would try to sell you things based on what he heard you talking about. He might tell others about it.
And he would give you a 2-week grace period to come back to him if you left.
I miss chatting with my friends. But I'm not going to do it while the Man looks over my shoulder. The value I put on my interpersonal relationships can't be bought by some nosy, lonely brat who thinks he knows what I should do with my social life.
Plus, who would name their kid "Facebook"?