At least one person posted here just last year about an encounter where a local sprayed him in the face with something (most likely bug spray) and then almost ran over him. He had to sidestep the pickup while he was trying to blink the crap out of his eyes. I wish I could remember the name of the poster...
I have also heard many stories of people on some of the county dirt roads being told to leave for "trespassing". These kind of stories go way back, but I will admit that I do not know anybody first hand that has had this happen.
I had the following encounter one time. I had stopped on the shoulder of 277 to let traffic I saw behind me go by. But instead of passing us, we ended up with one truck cutting in front blocking us from pulling forward, and one directly beside us, and a third behind and to the left, not quite boxing me in all the way. They started to get out and approach us. I put it in reverse and backed up just clear of them and just sat there. They looked at us a while, spoke to each other, and then ended up leaving without talking to us. I have no idea why they wanted to talk to us, but the fact that there were three trucks with about 5 people total and they boxed me in somewhat leads me to think they were not going to offer me a jump start.
You have to remember that our hobby is not popular or even the least bit understood by the local land owners. As far as they are concerned they could do without us, and would just assume us go home. And on top of that most of them are miss-informed and believe that we are breaking the law, when in fact any time they approach a collector they themselves are breaking the law by interfering with a lawful hunt.