My experience with feral hogs pretty much mirrors Dave's. We saw more sign than damage. Power pole/tree rubs and wallows during the summer were pretty much it. In fact, several times I threw limbs or yelled at them to get them away from a deer blind as I was approaching it. I never witnessed any aggression.
Biggest issue we had was at feeders, where deer numbers dropped tremendously if the hogs got used to the throw schedule and came daily. We wound up caging the throw areas, and the problem disappeared. On those we didn't, we had to t post the feeder legs to keep the hogs from rooting around the feeders and tipping them over.
