Well, the key difference is using the material to catch pedophiles, vs. someone just using it to propagate pedophilia. If they were to make someone a criminal who was using the material to catch pedophiles, then it would be hypocritical. It's an iffy thing, but not using the material would make it harder to ensnare pedophiles. They would be left with message board of pretending to be a child, or selling a child, etc. But putting it out there to traffic in the hopes of catching someone, is problematic. I'm not sure how the process is conducted.