In my case I downvoted because the author of the post considers it a basilisk. I'm not entirely convinced that basilisks exist in any real sense, and definitely agree with you that rationalists need an approach to them; but unless and until there is an approach, if you think some piece of information will cause illness or death (without positive results), it's morally wrong to share it. Thus, even though I think this 'basilisk' utterly harmless, I am not convinced all 'basilisks' are, and don't want people to keep posting things they consider harmful until there's a way of dealing with them. So on the basis of 'downvote if you want to see fewer posts like this' I downvoted.
My various interweb browsings stumbled me upon a potential Cockatrice in written, philisophical form. I've thus far read through the first chapter, and it is less anti-rational than most philosophical writings.
I'm reading through it right now, and will provide my feedback when I'm done, likely as a front-page post.
Personally, I'm a Fatalist, with some sort of Weird Soldier Ethic, who plans to go out the same way that Hunter did (if the cops don't get me first), but I've got a bunch of nonsense to Write first. I figure that'll make me somewhat immune. That aside, I doubt it's a real cockatrice - or we would've heard about it before.
It is a strong exercise in Nihilism. So, with those cautions given, I offer it to you: an extensive suicide letter.
Tip of the hat to this guy.