I really don't get the premise of this post. If someone wanted to dig in to my life via my Facebook account, he or she could have done earlier also. It would have taken many more clicks though. Timeline is another way of presenting the data.

The problem is with Facebook's privacy controls and I think they have improved from the rock bottom that they had reached. Timeline will change our behavior on Facebook and that is something the News Feed also did. I don't see how that is necessarily bad.