Cass, I have learned that when things get a little heated on message boards, the best tactic is just ignore them, and move on. There is no sense trying to explain to some people, things that are posted for fun, if they don't get it.
I follow the words of my favorite Biblical quote:
"Go from the presence of a foolish man, in whom thou perceivest not the lips of knowledge." Proverbs 14:7
In other words, "Don't waste your time arguing with an idiot"