Here’s an article in New York Times:
http://www.nytimes.com/2008/12/14/business/media/14digi.html?pagewanted=1&_r=2&ref=business
People have learned to ignore the ads shown on social networks like facebook. This article also mentioned a little about facebook’s targeting skills. Faceook was able to target a brand or product speciffically to one person. That brings our attention to issues in invading people’s privacy. What should be the limit in data that facebook administrators can access and use?