May I additionally suggest that if Renderosity is suddenly finding an increase in comments they don't like to see on the forums it might be that they are no longer engaging the people they want to (i.e. have turned them off)? You tend to get negative comments more frequently when people (customers/artists) are unhappy. At first they will be constructive as long as they feel someone who cares is listening. After the customers that you want to engage get tired and leave then what remains will likely be the more vocal negative outliers. I don't know if this is the problem here, but management should consider the possibility. Again, IMHO. If it is, the harder you crack down, the less valuable and more cranky the forum will become until finally even the outliers realize they are shouting into the empty wind and go away.