Do you agree with the poor and gutter responses by wingo1? Nobody has problems with people disagreeing with you but surely the manner in which they respond is a different matter.
A moderator is in position to monitor posts and 'moderate' (that is their job) contributions. If they participate in posts their moderating power loses strength.
They referee and not play.
"Education is an admirable thing, but it is well to remember, from time to time, that nothing that is worth knowing can be taught"(Oscar Wilde)