I am not sure it's 'all good' with people like Hunter.
Where I think it gets murky is when he ends up grooming lonely old men that lack affection and have no intention of 'going after' young girls.
Then a young girl comes up to them and basically gives them the come on. You could have a situation where some lonely old virgin who has never had female attention gets targeted.
In effect, they could very easily create a criminal that would otherwise have never offended.
He does, after all, have to go out and find offenders in order to keep his gig going on.
It's like when UK social services were taking people's kids off them because they had to keep their numbers up, not because the kids were in any danger.