What game are you talking about? If it's Combat Arms, the aimbot works perfectly at any range I've experienced. Some examples are from the helicopter pad to the other side of the map on "Oil Rig," across the valley in "Kill Creek," and from hill to hill on "Snow Valley." Just because the aimbot works, doesn't guarantee that your bullet will cause damage at a distance that great.
BF3? Members and myself are going out past 1000mteres now. and with the kill all hack you can wipe the entire server out in a few seconds and keep killing them over and over when they spawn without firing a shot.