That should be exterminated.
According to the Missouri Department of Conservation, all the current crop of feral hogs in Missouri were released by people who want to hunt them. They won’t be destroying their crops and woodlands, so what do they care?
You accused the poster, who was helping out his landowner friends, of being inconsiderate of landowners, which was rude.
Wherever they came from, they are there now. That is the issue. I doubt the poster deserves an iota of blame.