This is actually where roleplaying, personal belief, and video game settings clash. I personally don't see much point in killing, Jedi's never kill their prisoners. You should always defend yourself and others, but humans are fragile things, death can happen, but your goal should never be to end anothers life. etc.
From a RPer's perspective, this would be an easy thing to abide by, but we have to realise, that in this game, life and death do not exist. We have to defend ourselves, less loose our supplies and not be able to actually play the game. We cannot take prisoners, the game does not allow for that style of role playing, and most of the players who go out of their way to harass other players are douche bags about it and will continue to attack, even after they lost. To them, there is no honor, there is no such thing as a fair fight. They must win, they will win.
So, the best way to play by this ideal, is to ofcourse, not run around slaughtering people, you can also choose to run from a fight if you can, but you will likely not have that option.
Me personally, would rather stand my ground and protect the weak, and give my life to save theirs, but not go out of my way to pick a fight.