grelmar - 8:47 pm on Jun 13, 2011 (gmt 0)
I suspect part of it is that a lot of people, especially the youth market that dominates FB, are starting to realize that living in a FishBowl sucks.
Being a "Rock Star" can be fun for a while, but sooner or later, you take the Rock Star hit of infamy. It just takes one person to post that embarrassing photo from the beach or "that epic party at Fred's" and all of the sudden, your little circle of fame isn't so much fun anymore.
Youth don't inherently understand privacy. They experience it viscerally.