One fix might be to implement something like Facepunch Studio's forum system. You're auto-banned for a day if you don't capitalize your thread titles and banned by moderators if you shout in ALL CAPS or misspell words.
But that's solving a problem we don't have yet? I think this particular uproar is the liveliest discussion we've had on news.yc and even this isn't terribly exciting.
Perhaps it was just over-zealous editing, but budu3 makes an excellent point about attribution.
I post here under my real name, and I'm always careful to think through what I post.
If I get the sense that what I type here is going to be changed arbitrarily by 3rd parties, that is going to end my participation.
I understand you're trying to prevent what happened to slashdot and reddit, but there is such a thing as going too far in the other direction.