That's ridiculous. I mean, yes, if someone writes about sexual activity among kids that age and make it titillating for adults, in a PWP sense for instance, then yes, that's definitely bordering on child pornography. However, art, story-telling, when there's a point to it and a reason for it, and it's not pornographic, is another matter entirely, and to flag that as kiddy porn just because it happens to contain a 12-13 year old being, well, a 12-13 year old, that's truly ridiculous, puritanical and just plain stupid, IMO.