Mass media representatives claim that the impact of mass media on attitudes and conduct of a mass media on audience has not been proved and cannot be separated from other factors provoking aggression, brutalization and vulgarization of social behaviour (in particular among children and young people). By affecting the feelings of children in particular, mass media evoke strong emotional experiences, resulting from watching not only sights of terror and cruelty shown in films, but also other programmes containing content of high dramatic tension. In many television or video films the world is depicted as a community of people with prevailing ruthlessness, cynicism and the worship of wealth. It is very early that children get accustomed to the sight of blood, torture, crime and seemingly neutral scenes, which as a matter of fact very strongly affect their nervous system. Emotions experienced by young viewers are often transformed into long lasting states of general fatigue and irritation, causing discouragement and aggression. Research conducted by Andrzej Bałandynowicz shows that violence in the mass media assumes increasingly brutal, treacherous and perverted forms, which is also noticeable in new information carriers (electronic multimedia, information portals, discussion forums). In addition, there appear extremely subtle and difficult to notice mental manipulations which break the ethical code of the audience. Elimination of these risks should first of all involve protecting juveniles against harmful mass media content.