If you want to run a decent and clean community forum then you will need to have some rules for your member as well as for your staff also. If your member and staff will follow rules then you will have a fresh, clean forum with friendly environment. I have noticed on several forums that forum staff don't care about members. They don't reply or reply very late to their member's message, they banned member without notice etc.
May be they are not sincere. However, for my forum I have rules for both member and forum staffs and all of them need to follow those rules. If they will not follow rules then I take action against them. I think rules are very important for a community forum. However, let me know if you guys also have rules for your forum staff.