One researcher described Facebook as "like being a mini news channel about yourself. The more people you have the more you feel there is an audience there." Find out more after the break.
This isn't the first study to focus on negative consequences from Facebook; another recent study focused on students that found that they consistently overestimated the happiness of others on Facebook (makes sense, given that we're more likely to post positive information than negative), and consequently felt worse about themselves.
In the sense that we are able to control information distributed via Facebook, it is like a mininews broadcast containing only pieces of our lives. Any associated negativity appears when people assume that their Facebook life is akin to their real lives. A suggested remedy: understand the difference!