The way i see it is in a GAME you have the option to make it a fair and honorable fight. After all it is just a game and is meant to have fun with. So the concept of a fair fight is acceptable and touted as a good thing by most players. For the most part though the "fair fight" credo goes out the window as soon as some players start losing. Its all good to go on and on about fighting fair when you are winning but too many times when some are getting their tails whupped they scream for help. Their are a few who will duel until death one ship at a time though and those players are to be respected in my opinion. Like i said this is a game and we are supposed to have fun with it.
Now on the other hand you have the real world we all live in and that is a totally different thing. Human lives are at stake and death and suffering are the result of war. So the idea has evolved that the use of overwhelming force is acceptable to put and end to the war as fast as possible. It is debatable as to weather this works or not. In the real world a soldier is NOT going to drop his rifle and pull out his combat knife if an enemy is coming at him with only a knife. He is going to shoot first and worry about a fair fight once he gets home safely. I have not personally been in combat i did my service aboard a nuclear submarine but i do know a few vets that did see combat and most of them say that when it hits the fan you do what you have to to survive and worry about morals later. For the most part chivalry and the code duello died with the advent of weapons that could kill beyond arms length.