I think you need to take a few classes on what value callers add to a show. Particularly a political advocacy show. The caller's reason for being to to make the show better. In a comedy show, that might be a funny call. On a political show, the caller's SOLE purpose for being is to help the host make the point he's trying to make. Either by reinforcing his words, or by presenting an opposing view that can be disputed or discussed. It's not the "Joe from Houston" or "Bob from Long Island" show.
Finally, what's with the name calling? I'f hardly call a deaf man that works in radio a "coward". He uses the calls to make his point.
If you want a back and forth with no end, call your neighbor and argue with him. Rush has three hours a day to make the points he wants to make. I don't know where this idea that callers had the absolute RIGHT to derail a show unhampered comes from, but it makes for horrible radio. No one wants to hear angry caller after angry caller ranting against his or her favorite host.
And lest this degenerate into any more Rush bashing, the points I make stand for any talk show. Callers are there to (as a pro wrestler would say) put the host over. There are many tools a host can use to get over, and callers are one of them. They're just a piece of the puzzle right along with show prep, having good actualities and having the board set up right other technical stuff.