A new study out of University of Arkansas found that a link between depression in teenagers and the amount of time they spend on the Internet and playing video games. Although it is difficult to discern cause and effect, as depressed teens might spend more time playing games as an escape:
and how misbehavior online can land a teen in big trouble:
http://www.securitynewsdaily.com/online-misbehavior-teen-legal-trouble-1140/