MySpace recently announced that it has turned over to authorities the names of 90,000 registered sex offenders previously on—but now banned—from the popular social networking site. And as troubling as that astronomical number sounds, it only represents convicted offenders who were using their real names. The true number of predators prowling through social networking sites such as MySpace is impossible to determine.

(Ironically, this news follows a report last month suggesting that the safety risks of using such sites may be exaggerated.)

Parents should check out the CR Babies and Kids Blog, which offers advice for keeping your kids safe online. Also see our Guide to Online Safety, which features a section on child safety.

—Nick Mandle