Dennis,
You have mentioned clear situation: bad guy against good guy and all is known in advance. In real life situation is sometimes by far more accomplished: you don't know is guy good or bad until he attacks you. If you draw your knife or gun against someone who isn't going to attack you can to provoke an attack or/and nasty legal consequences.
On the other hand, if guy is really bad and is really going to attack I have a lot of doubts that he'll escape seeing your shiny blade.
So my advice (based on live practices, sorry) would be: "Don't draw your knife or gun if you aren't really ready to use it. If situation doesn't justify killing your assailant - it's a lot of stupidity to demonstrate your weapon. But if you are sure - your life is in danger and you have no another way to save it unlike cutting or shooting your assailant down - do it without prejudice. Believe me, your chances to survey will be much more real."
I think it's a very important reason to vote on non-reflective knife or gun.
One reason more: in close combat it's much more difficult to recognize non-glare weapon in your hand to attack it.
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Sergiusz Mitin
gunwriter
Lodz, Poland
[This message has been edited by Sergiusz Mitin (edited 28 December 1999).]