Blooz is right. Some say its all about the fight. If that's true the kill aspect really shouldn't matter that much. You have a good fight even if some one else gets the kill. You guys really have to stop being so confusing it is getting hard to keep up. Its not going to change no matter how much you post are give people a hard time. You may sway some "to the path of righteousness" but you will never sway them all.
A good fight is to the finish. Even if the finish is one plane being damaged to the point of not being able to continue and the other waving off, saluting and wishing him luck on making it home.
The kill is not important necessarily to the 2 fighting. It is obviously important to the one who has to jump into another fight just to get one. That is why it is usually comical to back off and let your adversary kill the interloper.
If you really want to see something funny.... stay in and and make the interloper think he is roping the con for you.... but don't shoot the con.
If only one changes their ways it is still an improvement to the community as a whole. If your not interested in changing so be it. There are others who will.