Without getting into the ethics of head shooting deer, what would you do in the following 'theoretical' stuation?
You've just stalked into a good muntjac buck, maybe not gold but almost certainly medal, you've crawled the last 50yds on your belly through some rather unpleasant mud, set yourself up prone off the bipod at about 60 yards but... The muntjac buck is lying down partially covered by a tree. You've been watching him for 20 mins and the only time he stood up (when a dog barked in the distance) his body was obscurred by a branch. There's thick cover to both sides of him and if he gets up again and moves, it's very unlikely you'll get a shot. You've got a clear shot at his head, but you know any shot will almost certainly blow any chances of mounting the head.
After stalking the same bit of ground for over a year, you know how hard it it to catch up with the muntjac and you've certainly not seen this buck before. Do you leave him for another day or put him in the larder?
As you've prob guessed, this is position I found myself in a couple on nights ago!