@julesh "I would simply have a clear and objective moderation policy." My experience is that the hard parts of moderation are never clear or objective. Human communication is subtle, nuanced and different across different cultures. The more ridged the moderation policies, the more they will exclude voices of people who are not like the people who wrote the policy. At the same time an over reliance on objective measures leads to people doing "letter-of-the-law" posts that violate the spirit of the rules (e.g. Rule: no swear words. response: "Well Bleep you you Bleeping mother Bleeper").
Moderating small culturally homogeneous groups defined by common interest and experience is a totally different world that moderating an open general discussion forum.