We have seen it in a few games, Modern Warfare off the top of my head, but all those NPCs are just in those helicopters and harriers circling above and firing on who they see so its not that bad. They aren't in the way at all most of the time. Now what about giving that the same treatment to ground vehicles, but to everything. Tanks, Humvees, 4 wheelers, etc. How could it work even if possible or would it just be a flat out bad idea?