Jim,

I would tell them they can leave if they do not like the match.

Here is a problem with people who continually complain over the course of a match. Other people hear the complaints, over and over again. Eventually they do not want to be at the match and stop showing up because of the complainers. Fortunately Jim B is hard core and will continue to shoot. I know if that I heard a bunch of complaining when I was realativly new to the sport I would not have continued.