In the US, in one jurisdiction for example, the way the law is written, child porn is child abuse, and the way the law is written, child means 17 years of age and under.
OC question is very clear, she refers to a minor under the age of puberty, as I understood her question, and who could argue with her is what RO was pointing out. What is misleading about OC's argument is that she only narrows it down in her question but that is not the way laws are always written; wt has a legal duty to comply with mandatory reporting in whatever the law requires and when required wt must report child porn. That is all that matters. According to wt morality, having any immoral thoughts is wrong, let alone wachting any porn, and any person having pedophile feelings -who wants that person around, I would not; wt on the other hand has both a legal duty and a spiritual duty towards the person and everybody else in the wt community. It is a complicated issue for wt.