Congratulations on a outstanding shot and a difficult hunt. As many know, late season hunts can be difficult due hunting pressure, weather, and down right freezing to death. I have much admiration for anyone that works hard enough to obtain a shot during the late season.
We all know that the work just begins when the shot is taken and many hours are spent packing the meat out. Hunting, regardless of your method, is not just about the shot. It is about the entire experience from scouting to enjoying the meat that you have harvested. It appears that this man did thoroughly and successfully enjoy the entire hunting experience. Thus, his method should not be in question, especially by another hunter.
If you are a hunter, then you must respect the method(s) of other hunters. Some may be very proficient at theirs skills and feel shooting an Elk at 100-200 yards would be like "shooting fish in a barrel". An 800 yard shot may have also been the only shot that they had. It is evident that this man was up to the shot. I only wish that I had the vision to make an 800 yard shot.
Normally, I do not post much on any site. However, this was just too much! Hunters attacking Hunters are exactly what the anti-hunting population strives for. This man worked hard for his Elk and should not be disrespected!