Beat me to it.does the Sirlin article REALLY need to be posted again? REALLY? http://www.sirlin.net/Features/feature_PlayToWinPart1.htm
Seriously tho, I have done that type of **** before - when playing with my buddy in Samurai Shodown IV, if we hit the other person with a super move we'd actually back off and let the other pick their weapon back up. But that is the only time I'd even consider being 'honorable' (and besides that was kinda a special situation, we just didn't like playing with no weapons) - if I'm playing casually against friends and don't necessarily need to go for the throat. If it's someone I don't know, money on the line or not, give no quarter and expect none in return.