I'm kind of ambivalent about them. We don't have cows anymore, so they aren't messing up our pastures or anything. They are just as much fun to shoot as a deer and you can shoot them whenever you see them. So, I really don't mind having them around.
Admittedly, that is sort of a selfish view, but in my area at least, they don't seem to hurt deer numbers. There seems to be plenty of food for them all. Sure, they eat a lot of the acorns, but there is plenty of browse left for the deer. So, I don't mind having some around.
I reckon I'm the opposite end of the spectrum. While I enjoy shooting them, I am well aware of the damage they do. Not only to the environment, but to the economy as well.
If I knew I had the last wild pig in my sights and there would never be any more feral hogs after that, I would squeeze the trigger. 
