A bit unreasonable if he simply captured a few pics of girls under eighteen unknowingly amongst ten of thousands.
Not that I am defending his actions, since I know nothing about what he was doing. Though personally, a while back I met someone who said she was in her twenties, who turned out to be seventeen and had altered her ID card to that effect.
So if inadvertent in the scheme of things, it may be an issue of pornography in general, as opposed to child pornography. Of course if it’s obvious that the person is underage/underdeveloped, you could argue that he should have not including it in whatever he was offering.
Though on actually reading the article….and mention of schools, I think it’s best to step back from any defence of his character.