Danah Boyd of the "American Association for the Advancement of Science" has published a scientific paper named "Identity Production in a Networked Culture: Why Youth Heart MySpace"
A few excerpts:
Adults with authority control the home, the school, and most activity spaces. Teens are told where to be, what to do and how to do it. Because teens feel a lack of control at home, many don't see it as their private space.
Teens have increasingly less access to public space. Classic 1950s hang out locations like the roller rink and burger joint are disappearing while malls and 7/11s are banning teens unaccompanied by parents. Hanging out around the neighborhood or in the woods has been deemed unsafe for fear of predators, drug dealers and abductors.
What we're seeing right now is a cultural shift due to the introduction of a new medium and the emergence of greater restrictions on youth mobility and access. The long-term implications of this are unclear. Regardless of what will come, youth are doing what they've always done - repurposing new mediums in order to learn about social culture.