“[T]he Federal Communications Commission should reestablish two principles that formerly served this country well: the public service requirement and the fairness doctrine. Every television and radio station should once again be required to devote a meaningful percentage of its programming to public service broadcasting. The public, after all, owns the airwaves through which signals are broadcast, and the rights-of-way in which cables are strung. And every television and radio station should once again have to follow the fairness doctrine: those with opposing views should have the right to respond to viewpoints expressed on the station.”