Yes, it is, but no, it isn't. I present, for your consideration, the most depressing number in the world:
http://dx.doi.org/10.1016%2FS0145-2134(96)00180-9
"female and male child sexual abuse prevalence estimates [...] were 14.5% and 7.2%"
That's one in seven girls, one in fourteen boys. CSA is quite honestly the most insane and awful aspect of Western society bar none. And decades of crackdowns, teacher-initiated interventions, and, well, spying on every phone call in the country have failed to make a real difference.
So we target child pornography. We target child pornography because child sexual abuse is the biggest social problem in the modern era, and we don't know what else to do about it. I don't, honestly, know of any real evidence that there is much to be accomplished this way. Porn isn't correlated with rape and even though in this case there's no way that the porn could be made ethically it's a bit like stomping termites in a sinking boat.
The thinking is really that by damaging pedophiles' online support network they will be discouraged from engaging in such repulsive acts. Unfortunately, while I'd like to see it work, it doesn't make sense to me: people were raping children long before fiber optics got involved.
I don't really have a good answer. I hope this guy rots in jail.
http://upload.wikimedia.org/wikipedia/commons/b/b0/NIH_child...