Grunker
RPG Codex Ghost
That's definitely a good thing in WL2. I wonder if you can "complete" the game if you kill every npc.If "help NPC and he'll reward you, kill NPC and he doesn't" is a good example of C&C, then Bioware is the king of reactivity.
Implying you can freely kill NPCs in any Bioware RPG since BG2
If you keep killing "everyone" you'll get an ending way sooner than otherwise. "Complete" the game is a flowing concept I suppose.