Maybe not a libertarians idea of an ideal, but conservatives have never shied away from the public square and whether or not open sewers whould be allowed to run through it...that's why we have zoning. V's wife.
I'd submit that a cable television station is more easily avoided than a public square. In the case of cable television, people actually buy the service. So, if someone doesn't want the product they simply choose not to buy it. After careful examination of multiple offers for cable television, I myself have chosen not to purchase the service. The $300+ a year I save buys many, many magazines, books and other media of the type that I prefer.