Internet Privacy, the end of us all?

The Facebook revolution has caused a new phenomenon, some good, but in my opinion, a lot of it bad. I personally know of many people who have decided to stay away from facebook all together. Others who made accounts, but latter decided to erase them. And then in the end, decided to reactivate them. Basically the problem stems from the fact that when you sign up, all the privacy features are switched off. This means that people can basically view what somebody is doing at any time of day. Switching these privacy features on is a little difficult. I believe they did this on purpose.
Knowing what everybody is doing, at every time of the day is great if you are on perfect terms with all your friends, but in life, this is hardly ever the case. Take the example of ex-boyfriends/ ex-girlfriends, or god forbid, deranged stockers.
This all ties back to one important necessity for all human beings. A certain degree of privacy. In my opinion, people can expose about 90% of them selfs to everybody around them, but they need to save about 10% to them selfs. Be it, a fantasy life they have created or just to communicate with people from their past, or even strangers. This is a gray area, and I am sure some may not agree, but as long as certain lines are never crossed, I think it's alright.
If you don't maintain this 10% to yourself, the stress of being constantly exposed can be too much. A little mystery can create enough spice to get through life.
So weather it's facebook, or standard email, it is essential to keep this part of our lives hidden to the rest of the world. If we spend more time than ever on computers these days, it is important to keep more of our internet activities private. This give us a place to escape to when we need it.