In the southern United States it’s open season on wild pigs to keep the population under control.
In at least Texas, you can take a machine gun mounted to a helicopter to go hog hunting: https://www.helibacon.com/texas-helicopter-hog-hunting/
This article is light on the risks of an unchecked feral pig population. Pigs are dangerous. They’re mean, dirty, and can wreak havoc in ecosystems. Coming across a feral pig is dangerous, and they travel in squadrons so it’s likely you’ll cross a handful at a time. Unlike most animals that will leave humans alone unless they have reason, feral pigs will pick a fight.
That these researchers are saying the pigs are pushing into human settlements is cause for concern.