I don't care if it's a million acres most hunters don't walk that far. Some do but I try to think about all scenarios and what could happen.
Even if a person wasn't on that bird at the time most likely the hunter would be in hearing distance and would be working his way back toward the bird. This could be very dangerous due to the other hunter coming from the opposite direction. They could end up facing each other and unaware of it. If I see a vehicle I don't even stop to listen. That's just the way I roll.