Being Lawful Stupid isn't exactly good roleplay in my book either (my own alignment aside) But I take your meaning, there should be feedback for playing towards and against alignment, but I'd rather it be in the narrative instead of in a system completely separate that is just for tracking, rewarding and punishing it, like in so many other games.
I guess without doing a redux of the "Disappointing Paladins" thread, paladins not being intrinsically tied to an alignment and deity, makes their oaths such a sticking point. It's hard to argue you're in keeping with your oath if an external entity that defines it, decides you've broken it. But in those instances you'll get clear feedback about your actions, whereas someone trying to game the system to be the one Grey Jedi in the universe is making decisions that aren't consistent with a character, but with whatever edge case they're trying to pull off
