Years ago on TBN, one of our more prolific posters at the time, reported two landowners he knew who were sued due to horse related incidents. One incident was in SC if I remember right, and the landowner was sued when people riding horses trespassed on his land, one of the horses slipped in a stump hole and the rider was injured. The other incident might have been in IA when the landowners daughter invited a friend to come ride horses. The friend's brother showed up with his sister, the friend got up on the horse, the brother slapped the horse on its rump, the horse reared up and thew the sister who was injured. In both cases, the landowner was sued for actions they had no control over.
Since we bought our land, NC has passed laws, that in some cases, might protect the landowner in certain circumstances. Having said that, I follow the instructions in an NC Extension office document about protecting landowners from liability. I keep the land posted which minimizes liability since the trespasser, say a rider on a horse, will be committing a criminal act to be on our land. No way would I let anyone on our place to collect downed trees, especially if they have to run a chainsaw. The liability risk is too large for no gain to me except being a nice guy. You can get someone to sign a piece of paper but I think that is not worth very much in court.
Later,
Dan