All good points (and apologies to the OP, but since you asked about SD, here we are), I think that in this 'litigious' society a reasonable man, and his 'defense' in the inevitable court case to follow, will have to include telling the perp to 'halt', which also gives away your position, and a warning of what will follow. That with a 'rack' should make the point, and though I would prefer the gene pool of such be extinguished, this is what we live in.
In the real world of KOBK aint no question that he's the one going down, but we need to urge the complete think through of the scenario, especially for those with minimal, or no, training.
If you aint prepared mentally, you aint prepared, no matter whats in your hand.