Was Scar dishonorable, you ask? Why, no. It seemed like it, but no. Not at all. Well, maybe. But it may be that I just don't like the Preds in AVP. Hate if you will.
Well, there are points to be shown from the movie to prove this, so I might as well put them up.
Scar checked Weyland if he was honorable kill before moving on, in which he wasn't, so he let him go. The only reason he killed Weyland was because Weyland was armed and was able to
injure Scar.
Scar killed the "Quinn" guy at the bottom of the hole because he was a minor threat, but a threat nontheless, because he had a weapon. But since he was more-or-less injured and not able to move, I have no idea why Scar ripped his head off.
That goes to show you that, even though I did not post all of the points from the movie, Scar is considered Honorable.
EDIT:
If blooding humans is against Yautja Law, then why, in past history, have Elders done that?
"To me, everyone is crazy. The ones in the Mental House just got caught."