It is stupid. Young people suffer from peer pressure to drink and smoke. Men of all species will do dangerous things to impress females that are present. Heck even guppies have been shown to do the equivalent of 'train surfing' if females are present, take them away and they don't do such foolish things.

As much as I think our meme's and gene's when in alignment can be far more productive, I don't think foolishly wasting resources is a grand act.

The act of creating life, raising that individual, teaching them and keeping them healthy... all to throw that life away on some moronic notion of personal honour in a duel. That is the pinnacle of sheer idiocy. Honour your country, your ancestors and your ideals, but do not pick a path so pathetic that all that society has invested into is thrown away over a personal insult.

Create don't destroy.

If people are so out of tune with their instincts that they think dueling to the death is natural and healthy then they have a lot of maturing to do. Most animals that fight over mates do so with minimal damage done were possible, personally I prefer the Bonobo's dueling . As for those who can't form the beast with two backs because they have feel curtailed by social norms, then they too will be edited out of the evolutionary track.