Then why debate with them? There is a saying: "Never debate a fool....he'll bring you down to his level and beat you with experience."
It depends on the reason for debating. If you think we debate to convince our opponents, you are wrong. Most of us have been here long enough to have gotten over that illusion.
Most of us debate to demonstrate to lurking enemies of FR that some of us understand biology. It is sad when the opponents of evolution can't even describe correctly what they oppose.
Since the CBS/Rather affair, FR has lots of enemies in the mainstream media. I personally don't want to see FR dismissed as easily as we dismiss DU -- a bunch of ignorant, partisan hacks who cannot tolerate substantive debate.