[JabavuAdams]

My model of Paul Graham assigns that a very low probability.

The parent's argument hinges on being able to clearly distinguish what people call porn from criminally-produced media. Essentially the No True Scotsman Fallacy.

My point is that it's basically impossible to do that, in practice. Sure one could imagine a conscientious porn consumer who only goes to certain trusted producers. Maybe that's what you're getting at with your PG reference?