Great post, pedophilia and child pornography are unfortunately a much bigger problem than many people realize. Due to its extreme taboo nature it's something that's rarely discussed except for knee-jerk reactions like "pedophiles should all be shot". İt's a touchy subject.
What I'm a bit unclear about though is what ethical porn practices you actually suggest to help diminish the problem?
With ethical sourced porn, then we know what we are looking at, who we are supporting when we do and we become accountable for the porn that is out there. Hell, even porn sans teen would cut down on some of the demand. That and ethical porn also requires conversation, which alone would also be a good start. I think, before we can do anything good with the topic there needs to be understanding, which comes back to the communication thing.