social networks: good or bad?

I often have discussions about social networks with my very hip young adult son, who has made a conscious effort to avoid most networking opportunities..text only when necessary, email for information only, and the evil facebook..well, that is another whole animal.  He truly believes facebook and other social networks might be causing more of a wedge to face to face interaction, or even a human voice connection.  Think there is some truth to that. I wonder how the new generations of preteens will conduct themselves in a job interview.  Perhaps they could text the interview.  I also think, however, those folks who are a bit socially shy-it has opened up a new door for them.  Quite easy to hide behind the computer and communicate as opposed to a face to face.  And heaven knows how many connections we made from our past from this tool.Wonder what will be the next big tech breakthrough next year...