Losing privacy sooner than you think (thanks Facebook!)

Now as we are a young people share the most of details of our personal life on social-networking web sites, such as Facebook and blogs that is preserved on the Internet, maybe forever. At most college campuses, more than 90% of students maintain their age, their occupation, their level of education, their place of residence? I think most of us would have no problems providing this level of general information. While the religious views, political inclinations, relationship status, etc. Perhaps this is a little more private and maybe you feel less comfortable with this level of information but also most of us would be fairly relaxed about providing this information.
On the other side our parents, for whom recollection of the past in thier fading memories, photographs or at best, in videos. This change raises redefining what is public and what is private? That openness is both good and bad. People can now spread their ideas everywhere without reliance on publishers. But also creates threats to privacy and reputations. So can we prevent a day which we can't control our information and the privacy are beyond our control? Some technologists say NO!! Privacy is not compatible with a world in which information flows so freely. As Sun Microsystems' CEO Scott McNealy said “You already have zero privacy anyway.. Get over it”!! And there are many articles and books have heralded the "destruction", "end" and "death" of privacy. But I think it's still possible to protect privacy, by rethink classical understandings of the concept of privacy "that requires total secrecy" becaouse this concept is unsuitable to an online world. Maybe the more suitable understanding of privacy is that everyone should keep some control over his personal information that becomes available for public.
As it's known that privacy is the user's responsibility, in the middle of December, Facebook began prompting users to re-evaluate their privacy settings on the site. Founder and CEO of Facebook, in defense of Facebook's privacy changes last January “People have really gotten comfortable not only sharing more information and different kinds, but more openly and with more people. That social norm is just something that has evolved over time.” And more recently, in introducing the Open Graph API “... the default is now social.” this means Facebook not only wants to know everything about you, but to make you available to everyone. Even if you adjust all your privacy settings as a private "friends only". It's shared with applications that you use. Which means now you're not only trusting only Facebook, but the application developers too. So that's why I think, the future of Facebook is the end of privacy.
I know that privacy doesn't mean secrecy... but I think it's still important!!