Require all members to moderate discussions. If members regularly behave abusively or in a hostile way, they can be warned, then suspended or expelled. The consequences for disrupting discussions and for repeated personal and hostile attacks can become more serious than losing posting rights for a few hours. Few functioning communities in the world don't set some conditions for members. In other words, people can be held responsible for what they say and do.
Adolescent males are hungry for attention and peer approval.
They have plenty to contribute - brains, energy, information and technical skills. But they need mentoring. If their flames are met with a barrage of protest, criticism or ridicule, they'll take notice. At the very least, hostile environments will become an issue. Issues surrounding hostile environments demonstrate the notion of the social and technological trade-off.