How to ensure the well-being of America’s children has been a primary focus of public discussion concerning violent television shows, motion pictures, video games, and other forms of violence in the media. Educators and organizations such as the Minnesota Medical Association have published and distributed tips for parents concerned about media violence. Suggestions range from setting strict rules limiting children’s exposure to media violence to watching television with one’s children and talking with them about what they are viewing. Some families have resorted to doing without television or movies altogether.

While most Americans would agree that parents bear the primary responsibility for protecting their children from media violence, controversy remains over whether other members of society should also be held accountable. Some commentators argue that parents are solely responsible for their children’s...