Jane: Television programs and movies that depict violence among teenagers are extremely popular  Given how influential these media are, we have good reason to believe that these depictions cause young people to engage in violent behavior  Hence, depictions of violence among teenagers should be prohibited from movies and television programs, if only in those programs and movies promoted to young audiences  Maurice: But you are recommending nothing short of censorship
Besides which, your claim that television and movie depictions of violence cause violence is mistaken: violence among young people predates movies and television by centuries
The people who make the most profits in the movie and television industry are those who can successfully promote their work to both young and old audiences.