Mutiny at Craster's Keep
Looking back, I don't know why Mormont was so horrified by Tanner killing Craster. I know the "guest right" rule works both ways (a guest killing his host is cursed by the gods and vice versa), but Craster came at Tanner with an axe. It was self defense. Doesn't excuse the mutiny that followed, but maybe if Mormont hadn't flipped out it wouldn't have happened.
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