Period.
Besides, there is already a diversity of opinion out there -- it's just not all in one place. If I want the leftist view, all I have to do is buy a newspaper or certain magazines, or watch the network and, usually, local news, or listen to NPR. There is some liberal talk radio out there, but it is so dreadful that I can't imagine even most liberals listening to it. If I want the conserviative view, I have talk radio, the web, magazines. If people wants to expose themselves to all sides, then they have to do as I do -- shop around.
The "Fairness Doctrine" is just a thinly-veiled, Orwellian-monickered censorship law.
#20 of the GOALS OF THE COMMUNIST PARTY...
Infiltrate the press. Get control of book review assignments, editorial writing, policy making positions.
#21 Gain control of key radio, TV & motion pictures.