For those asking about the Dark Web, take the time this weekend to listen to the PodCast Hunting Warhead;
It will show you how deep and dark the dark web is and how hard it is to actually catch these people, usually a mistake is made...and thats how they are discovered. It is a story of a Canadian man who operated a child abuse material website, and also offended in real life.
Another good Podcast is Casefile - Episode Operation Cathedral. Same thing, different child abuse material ring.
Case 115: Operation Cathedral - Casefile: True Crime Podcast
There are probably hundreds, of these sites that LE is looking into. Sometimes it takes years to gain trust and get into them.
Also, they note in the Podcast that it should be called Child Abuse Material and not child *advertiser censored*, as it really isnt *advertiser censored*, its abuse. I think WebSleuth should grab onto this.