Eh, I feel I must make my opinion known here as it may shed some light on the CP topic...
CP is in the eye of the beholder. What this means is that CP is not JUST images or movies of innocent kids being raped. CP could be anything. Images or movies of young kids in nearly any situation.
There are whole sections of the internet dedicated to the "soft porn" of non-nude young boys and girls. These images and movies are often simply suggestive in nature but don't contain anything which would actually be considered to be CP. Many of the sites are disguised as "Modeling" sites and some are even run by the parents of the children who are featured. There often isn't ANY nudity at all on the sites, but the sites charge memberships for access to photo sets and videos. The problem with these sites though is that pedophiles can get their jollies off with these "legal" images and movies. Sure, they aren't CP to the authorities, but they are images of boys and girls of a young age which pedophiles can use in place of their typical nude images.
Most pedophiles aren't much different from any other "porn addict".
Sure, there are pedophiles out there who don't want to live a fantasy life and go out and try to contact children and have sexual relations with them. But I would assume most are just "closet" pedophiles who never leave the fantasy realm.
CP will NEVER go away. Not as long as the digital realm is around. Just like the idea of smothering the pirated music, movies, and software industry. It will always be with us. If the FBI really wants to stop CP, it needs to find a way to prevent the perversion that occurs in the minds of the people who think that CP is not wrong, or it needs to quit shoving it's "Judeo-Christian beliefs" about what is right or wrong in sexual relations between two parties down the throats of the American people (and the rest of the world too). Since they will never find a way to fix the perversion, and they will also never stop trying to tell the American people what their version of right and wrong is, the CP will never go away.
I'm not suggesting that the FBI give up in it's pursuit, but that these bumps in the road they are experiencing are nothing new and they will continue to have difficulty, no matter what angle they use.