For the same reason EY supports the censoring of posts on topics he has decided are dangerous for the world to see. He generalizes that if he is willing to hide facts that work against his interests, that others similarly situated to him, but with different interests will also be willing to work surreptitiously.
I'm relatively new to the site and I wasn't aware of any censorship.I suppose I can imagine that it might be useful and even necessary to censor things, but I have an intuitive aversion to the whole business. Plus I'm not sure how practical it is, since after you posted that I googled lesswrong censorship and found out what was being censored. I have to say, if they're willing to censor stuff that causes nightmares then they ought to censor talk of conspiracies, as I can personally attest that that has caused supreme discomfort. They are a very harmful mem...
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