There seems to be a missing bit here though. In the case of the 14 year old boy convicted of raping a younger child, the judge specifically cited his consumption of pornography as contributing to his motivation for the attack. There have been other cases where judges have made similar pronouncements including this one involving a 12 year old boy who raped a 9 year old girl.
I agree that sentencing of children for crimes can't follow the same lines as for adults. However, in these cases, the judges have suggested that the reason for the lenient sentences is that the perpetrators can't be held to the same level of "blame" because their use of porn was material to their crimes.
So, if there are legal judgements stacking up, showing that use of pornography by boys can impact on their propensity to carry out sexual assaults. Further evidence is mounting about the influence of porn consumption on attitudes and behaviour of boys and young men towards women which falls sort of breaking the law. There is also evidence showing heavy porn consumption can contribute to failed intimate relationships for young men.
With all this evidence amassing, why is no one calling for some kind of action to deal with this? Why is it only the occasional voice that says there need to be curbs on children's access to porn, or more constraints on suppliers of porn (e.g. harsher restrictions, heavier taxation, etc.) to reduce the volume, or education programmes for young people to counterbalance the influence of porn?
It just seems to be throw-the-hands-in-the-air attitude of, "Well yes, we know heavy use of porn by boys can contribute to their decisions to sexually assault other children, but that's just the way things are."