I was there (as an evil) when Gruntner participated in Morius's gamble and he rp'd it well, in my view. And given he lived with the flaw he got I wouldn't describe it as powergaming.

If you didn't associate with the taint of evil in any way you would never work to redeem anyone, and you would not be able to hold evil items in order to commune remove taint on them. So it's not as clearcut as it might first appear, in my eyes. And I say that as someone who gets annoyed at people bending the code. For example, shaman could kill my Paladin with plague because I wouldn't buy cures in Udgaard, or carry more than 5 gold. Whereas a gazillion Paladins have used the "saving for charity" excuse to carry lots of gold and spend it on themselves as required.