I’m not sure that what happens on those shows would qualify as debate.
Unfortunately, in our ultra-competitive social structure, we look at debates as though they are always a contest to be won. (Remember the passage from George Washington’s farewell address?) However, there exists a need for forms of moderation, etc. to insure that we don’t destroy ourselves in our zeal for "victory at all costs."
The more honorable purpose of a debate is to come to a consensus or compromise when all is said and done. A debate only for the purpose of “winning” seems rather dishonorable to me.
As for a few moments on TV, it is more akin to a gladiator sport. But this must be done with an identifiable form of dignity that resonates well with the viewing audience.
So, when it comes to this TV medium, I say go forth and kick some serious ass … with dignity and class, of course.