Each new development in the mass media has elicited highly charged criticism from alarmed observers. Comics, romance novels, music videos, and even movies, radio, and television have all been denounced as threats to children, teenagers, adults, and even the stability of civilization itself. Organized into community groups, citizens have repeatedly taken militant action against the media, ranging from book burnings to blacklisting and from harassment of individual publishers to attempts to regulate entire industries. Investigative committees and commissions are not uncommon. What is it about...