In the context of company owned forums and active ongoing censorship look at the two biggest examples - AV123 and Emotiva.
Than you have the others at the extreme opposite that do not censor at all. Axiom, Ascend and Aperion.
Companies that censor their forums usually have something to hide either about their products or the way they conduct business. On the opposite spectrum look at Axiom, they have quiet confidence about their products and when you run a business in an ethical manner, there is nothing to censor. Axiom should be VERY proud of the fact they do not moderate with a heavy hand.
