I also believe that community sites like orkut, hi5, facebook and many others are a real time wasting activities. They are like bulletin boards where everyone is opened to see and read about your personal thoughts and knowing about your friendship community. So, there is no PRIVACY involved with these sites. I think you can read many useful bloggers and articles on internet which may give you much useful knowledge to set your life directions. Make your life meaningful instead of finding and making artificial relationships on such community websites.
I hope you would not mind my suggestion.
Usman Khawaja