The Internet - the phenomenon ambiguous. It is bad that has no borders! That is, it doesn't protect teenagers from substandard information which children absolutely have no need to know. Along with useful information and positive communication, there are clubs of addicts, suicides, terrorists, the pornography sea that constitutes huge danger to teenagers at whom moral values aren't created yet, and thirst for "adult" entertainments of a bike. Special danger to the child consists in possibility of his involvement through social networks in extremist groups, the destructive religious organizations, whose activity is directed on commission antisocial, illegal, including penal acts.