After 27 years of surfing the internets, one thing about which I have become certain: the more "moderated" a forum becomes, the more the quality of posts drops, rather than rises. So, keep adding rules. Pretty soon you'll have a forum full of, "I have a large, red, protruding boil on my stomach...should I go see a doctor?" post, among many other highly engaging ones.
Do you know what the most "tribal" board is here? The Football Forum. Is that forum unreadable because it's an "us vs. them" forum?
Fortunately, we have an unmoderated forum a long, long, long ways away from here, just in case Mark is foolish enough to do this.