Does Privacy Exist Anymore?

As far as I know they're used to be a thing called privacy. One could have all their personal information and keep it to themselves as well. Then comes along the internet and... boom there goes your privacy you once had. This lack of privacy is most prominent through Facebook. We may 'think' that all our personal information 'is private' as millions of us pump it into the social-networking giant. But at the same time it could then be pumped on to a third party applications that use this information. Now i'm not one to complain about Facebook because I honestly don't know where we as a generation may be without it. The scary thing however is that someone I don't know  may know something about me. Some people may like this in fact it is argued that most teenagers are on Facebook simply for the fact to get their information out there, so they can feel special about themselves. Think about it, you're given your own web page where you have the ability to write down everything you like about yourself and let others to know about how important you are. In reality though what you are telling your 'friends' may not be tthe truth, or perhaps just a distorted version of the truth. This relates back to the topic of trusting our beliefs or what we know.