The one messy corner of this is the "strict liability" for this type of material. An underage kid can take a nude photo, send it to an adult, and then the adult can criminally liable for just having it, even if he deleted it as soon as he saw it. Either both parties involved in handing something for which there is "strict liability' need to be held accountable, or "strict liability" has to be changed so a person isn't liable if he deletes or reports the material as soon as he first becomes aware of it. And this isn't likely to happen because it would provide a plausible defense for every one criminally charged.