"It's not really the schoolyard thug character" in some cases, said Nancy Willard, executive director of the Center for Safe and Responsible Internet Use, a research and professional development organization in Eugene, Ore. "It's the in-crowd kids bullying those who don't rank high enough."What fuels cyberbullying is "status in schools -- popularity, hierarchies, who's cool, who's not," said Danah Boyd, a fellow at the Berkman Center for Internet and Society at Harvard Law School who studies teens' behavior on MySpace, Facebook and other social-networking sites.