They've progressively expanded through parts of the state they never previously resided. I've hunted the same land in Pickens County my whole life. My dad before that. I hunt most weekends during the season and, until about five-six years ago, I'd never seen a wild pig. Now, it's more common I do than don't. They are an invasive nuisance.
The good news is that the right ones make great sausage... and they all make great target practice. The bad is that where there are two, there will VERY quickly be twenty.