This happens where I am at to, I say it depends on the terrain. Where I am at if a guy was 100-150 yards or more from me then well so be it. I will out sit him and have had a few deer spooked to me because of that instance right there. It is so thick down here that I will not see a deer where they are sitting so it doesn't really matter to me as long as they play the wind right. I will normally whistle to the person or try to get their attention and generally they move off but that is the price to hunting public land. But if you are running into people go deeper in the woods.