Jd Smith1
Hero
Can't speak for @pemerton but I have never had a game where the villains were child molesters/traffickers, so, thankfully, that has never come up. I can't imagine the game made better by the inclusion of that kind of thing, but YMMV.
Just as a side note, human traffickers/slavers are a staple in my campaigns, regardless of setting. Due in no small part to copious endless material on how such organization operate (a good GM never overlooks resources) from mandated and/or assigned classes.