I had similar situations with other hunters on the mustang range. I twice got set up for long range shots just to have trucks pull up, hunters jump out, just to fire offhand shots at animals 850 yards away. They had no chance of hitting those animals. I think it was done for for spite. I had an opportunity to do one of the hunters a good turn later in the hunt by finishing his wounded oryx. The only shot I had caused a lot of meat damage, but saved him probably several hours of tracking and packing. I did not consider the legality of it at the time, but feel that ethically it was the right call.