I inform them that trappers help keep their taxes lower by controlling overpopulation resulting in conflicts with humans and/ or our pets or livestock that would cost their counties to hire a trapper
and
Trappers help reduce the diseases from that overpopulation such as rabies, distemper, mange--then I ask them if they have ever seen a raccoon on a sunny hillside-65 degrees day, laying there curled up in a ball shivering-"well I have, it is from distemper, it will die a slow death and go to waste."
and
that gortex coat you are wearing, being made from petroleum, has left a trail of pollution from the oil field to the store where purchased, and will not biodegrade, and is not a renewable resource, like fur is.
They usually walk away speechless after that and the more people listening the better
I've gotten some nuisance jobs from that speech!!