The only time moderation is really required is if someone says something slanderous or threatening to another member.
The proper action is that the slandered member (or someone who know it's slander) should hit the Report button...and say nothing in the thread until a moderator handles the situation.
If the insulted person wishes to calmly explain the situation as best he understands it so the rest of us see what happened that's fine but basically, can we all just Get Along like grownups?
and if you don't care for some people the Ignore Feature is your friend. Not here, but i have used it myself on other places. It's a good thing
