Well quite. Take Quigley (who is a bit of a hero around here):
Note that 'Whitey' drops the bucket on the blind crest of a dirt road. There's no way I'd take that shot. If there happens to be a rambler walking towards us from beyond the crest, the first bit of him we're going to see is his hat (containing his head), at bucket-level.
I have performed the same shot (simulated, to scale, with a pellet gun) myself, at Mick's range - in much safer circumstances. As have many others.