I've said it before and I'll say it again - you must leave these people an option to sate their desires in a legal manner which harms no one.
I don't believe allowing people to masturbate to child pornography (real or otherwise) is any more of an effective way of prevention than regular porn is for stopping a person having sex. Besides which, what about the paedophiles who just can't get their rocks off to cartoons? What are these poor souls to do? I mean look, a recorded incident of child sexual abuse isn't technically harming anyone, the harm has already been done and people watching the act isn't going to conflate said harm, so why not let them watch it?
You can no more stamp out pedophilia than you could erase homosexuality. Stop trying and allow them the small, insignificant courtesy of at least being able to look at artificial images in which no child was harmed.
Well the difference being that sane adult humans can consent to being f*cked by another man.
We are needlessly criminalising people for impulses they cannot control and shouldn't have to.
Should they not? Many deranged psychopaths feel an overwhelming desire to murder. Should they not have to control that? Here's an idea: Shove every man and woman who has committed an egregious unforgivable crime to society in a big cage and then RELEASE THE PSYCHOPATHS! We can charge $25 for a ticket, it'll be great.