Confidentiality - Is this now a foreign idea?

With the advancement of the Internet, with Facebook, MySpace, and blogging, what can you really keep confidential these days? Even if you don't participate in these website you most likely are already on them. With Facebook and Myspace your friends and family might have posted an unattractive or embarrassing photo of you on their page without your knowledge or permission. Young teens post their address and phone numbers on their webpages to tell all their friends of their new number or to "call me" but not only are they publicizing this to their friends but also to the entire world. How much of your life is really confidential? You can Google search a name and find out where they live, where they work, where they were born. You can go onto Superior Court websites now and search peoples names and know how many tickets they have had, what they were for, or if they have been convicted of other criminal charges. How can we escape and start life over with a "clean slate" or keep our lives to ourselves if they are blasted all over the internet without our permission or knowledge?