Why Facebook?

I was recently asked to choose a Web 2.0 medium to write an essay on. While going through my options, I stopped upon Facebook. Facebook is by far, one of the most popular thing among college students. Whether students are requesting that their classmates become their friends or just waiting for pictures of last night to be posted so they remember what happened, students are checking Facebook close to everyday. I have recently heard from many sources and through reading that companies are now using Facebook to screen applicants for the jobs they are offering. By looking at a few of my friends' profiles and a few of their friends', I realized that people do not really think about what they are including on these pages. A lot of people believe it is their freedom of speech to say what they want and post these pictures, but if it cost them their careers would they regret it? I believe that the issue needed more research and the topic, more coverage. For these reasons I decided that the Web 2.0 medium I would research and write about was Facebook.