Meaning of "Public Information" with Google and Social Media

Most of the legislations consider birth certificate as a public document. But will you be comfortable if it is publish on the internet? Having your email publicly available also is now becoming an issue due to spammers. This is a good eye opener for some facebook users. http://www.facebook.com/video/video.php?v=1209866160974&ref=mf

So it may be worth starting a discussion on this topic now to bring in more disciplinary guidelines in to internet applications.