The internet has changed everything. People complain about facebook and myspace because they violate privacy. I don't use MySpace, and last time I checked, theres no law that says it must be used. The same applies for Facebook. Also, as far as I know, Facebook has made it possible to completely remove yourself from its server, although the process could still be easier. But for most people, the amount about them on the internet is completely up to them. You wouldn't just leave your personal diary on a park bench would you? If you want something to be completely personal, DON'T POST IT ON THE INTERNET ANYWHERE.
The people I do feel bad for, are celebrities or anyone who has ever been in the spotlight. Mark Cuban wrote about this in his blog. I have a friend who was on American Idol last year and compromising pictures from high school surfaced on the internet. Surely, this would not have happened had she not ended up in the spot light. Ten or fifteen years from now she could have a child who googles her name and sees these pictures. As Mark Cuban said, it is impossible to completely bury anything in your past with the internet.