The one problem I keep bumping up against here is the definition of pornography.
Is it something that can be considered offensive? Offensive to whom? What some people consider offensive others may not.
Or is it something sexually arousing? Arousing to whom? What you may find arousing, I may find disgusting, or just bland.
So it seems that the authorities attempt to define it as something offensive to the community. But then, who's community?

I think that all here (or I hope all here) can agree that the sexual exploitation of children is criminal, without a doubt. But is posing children, whether clothed or nude, for photographic purposes necessarily sexual? Must we decide to ban such pictures just because one, or a dozen, or even tens of thousands might become aroused by them? By that rationale, we must ban any images which could be even remotely arousing to anyone. Which means just about anything!

We would have to ban wrestling, because there could be some pervert out there jacking off when the wrestlers are in a clinch. Or ban car commercials because some nut gets a hard-on while he watches that red Ferrari zoom over the road.

No, once you start trying to get into pornography you are opening a real can of worms.