Maybe Maimed: prejudice is the media equivalent of pollution. I agree with this, and it goes far beyond porn:
Porn companies are companies, and they have a product. What makes their product different from, say, a steel mill or a coal mine is that their product is largely cultural, not material. They operate in a completely different arena; they do not have to deal with resource scarcity or distribution in the same way, for example. But this does not mean they do not pollute. They do. Kink, Inc. is a massive polluter.