I like everyone's comments. I would like to add that we should all lead by example too. Perhaps when it is getting noisy to ask members to Please be considerate and table the comments until discussion, so others can hear the speaker.
You may have to do this several times at most meetings. It is like training a child to use their manners.
More and more people are becoming irritated at the fact that America has become very rude in many ways. People come to visit me and I note that when we are in public, they come across as demanding to waiters, shop keepers, etc. They bring their screaming children to stores that everyone has to contend with the misbehavior. We represent ourselves in a bad light and need to be more conscious of our behavior toward others.