What must be done is to let the network know that we are calling the sponsors of the show to tell them that we are boycotting their products until such time as they pull sponsorship from a show that will allow such a man on the air. In short, boycott all products that sponsor Letterman, and boycott the show.
I have deleted CBS from my TV. It is no longer one of the recognized pre=programmed channels. I told CBS, and I hope other Freepers will do the same.