This actually touches on another issue, which is the definition of "pornography". Weirdly, most people these days seem to make an exception for artistic adult nudes, but consider any image of a nude child to be pornographic. This is insane, of course. If you take a cute picture of your toddler playing in the bathtub, that is not pornography, yet a lot of people would lump it in under that definition, including many governments.

But when we're talking about images and video depicting child abuse, that's a different situation altogether.