>Other porn sites with user contributed content exist. I bet that those sites also hosts vast amounts of illegal material as well. The law isn't fully enforce

>Other porn sites with user contributed content exist. I bet that those sites also hosts vast amounts of illegal material as well. The law isn't fully enforced because doing so would have so many people arrested that it would lead to invalidating the law. As you said, the outrage doesn't really exists in those hard to tell cases, but the law isn't written to align with the outrage. So the content is largely ignored unless a specific case happens to get popular attention. Overall the standards are about as sane as our standards around other similar topics, which is to say not at all.