That's not defying (presumably their) morality, it's defying the local social code.
And while I agree with the quote, it's not rationalist (as it admits), but a great humanist statement.
That's true, isn't it? It's irrational in the extreme to defy a God who's real, will get His way anyway, and will punish you. Shame on you, Huck Finn, you irrational person.
I always see that the monthly Rationality Quotes thread has this line: "Do not quote comments/posts on LW/OB - if we do this, there should be a separate thread for it." This is the thread for those quotes.
This is a (possibly) monthly thread for posting any interesting rationality-related quotes you've seen on LW/OB.