RE: Deer exterminators!!!???
PA.....
You don't have to "justify" what groups (like the one I'm describing) are doing. They're doing it legally and ethically (unless you have a stance to put forth that states otherwise). They're providing a servicefor their clients (or they wouldn't be hunting where they do).
What's to "jsutify"?
Hell I give 'em a thumbs-up for ingenuity.