The pigs then invited themselves onto the neighboring properties. I cannot see any rational to overlook the problems that states like Texas are having with a population of feral pigs it took too long to recognize as a problem. Elimination may not be possible. Feral pigs are known to have the potential to carry diseases, some of which are zoonotic in nature. While I am not aware of any of the results of the tests run on these animals, the veterinarians who were collecting the samples remarked that the pigs appeared to be healthy.
Pigs have the potential of getting quite large if the food is available.
A complication to the temperament question is the Russian boar. While the Paradise Valley feral pig population has no Russian boar genes in its breeding pool, the Virgin River feral pig population is said to have a considerable Russian boar gene pool. The Russian boar is generally thought to be more aggressive. Time will tell. The feral pig has the potential to get large, is equipped with impressive tusks and is a voracious feeder.