And a wonderful essay by Miriam Meckel, professor for communication sciences at the university St. Gallen and fellow at the university of Harvard's Berkman Center for Internet & Society.
http://www.faz.net/s/RubCEB3712D41B6...~Scontent.html
It is about how internet tendencies of monopolising social categories and interaction limits the needed evolutional mechanism of social randomness, and how this makes people loosing their freedom to be whom they are, and spending more and more ressources to meet criteria of virtual peer groups - "profile" replaces personality. Not just in online interaction, but in the job world too, btw.
If you can handle the language, recommended. I think I once saw that lady on TV longer time ago, she is both very bright and very charming. She was Germany'S youngest professor ever (so they say), government speaker, and undersecretary. She is especially known for a book about burnout Syndrome.