It isn't a scientific program. It's an alternative way to hunt feral hogs and leave them for another time. I know guys who hunt them with dogs and knives. There are ancient tapestries that depict noblemen on horseback spearing them before packs of dogs.

That they are a pest species is beyond question. They damage the natural environment and eat anything -- vegetation, young animals, eggs, chicks, whatever. I'd be okay with people clubbing them like baby seals.