It looks like it turned awful since I've read it the last time:

This essay, while entertaining and useful, can be seen as Yudkowsky trying to reinvent the sense of awe associated with religious experience in the name of rationalism. It's even available in tract format.

The most fatal mistake of the entry in its current form seems to be that it does lump together all of Less Wrong and therefore does stereotype its members. So far this still seems to be a community blog with differing opinions. I got a Karma score of over 1700 and I have been criticizing the SIAI and Yudkowsky (in a fairly poor way).

I hope you people are reading this. I don't see why you draw a line between you and Less Wrong. This place is not an invite-only party.

LessWrong is dominated by Eliezer Yudkowsky, a research fellow for the Singularity Institute for Artificial Intelligence.

I don't think this is the case anymore. You can easily get Karma by criticizing him and the SIAI. Most of all new posts are not written by him anymore either.

Members of the Less Wrong community are expected to be on board with the singularitarian/transhumanist/cryonics bundle.

Nah!

If you indicate your disagreement with the local belief clusters without at least using their jargon, someone may helpfully suggest that "you should try reading the sequences" before you attempt to talk to them.

I don't think this is asked too much. As the FAQ states:

Why do you all agree on so much? Am I joining a cult?

We have a general community policy of not pretending to be open-minded on long-settled issues for the sake of not offending people. If we spent our time debating the basics, we would never get to the advanced stuff at all.

It's unclear whether Descartes, Spinoza or Leibniz would have lasted a day without being voted down into oblivion.

So? I don't see what this is supposed to prove.

Indeed, if anyone even hints at trying to claim to be a "rationalist" but doesn't write exactly what is expected, they're likely to be treated with contempt.

Provide some references here.

Some members of this "rationalist" movement literally believe in what amounts to a Hell that they will go to if they get artificial intelligence wrong in a particularly disastrous way.

I've been criticizing the subject matter and got upvoted for it, as you obviously know since you linked to my comments as reference. Further I never claimed that the topic is unproblematic or irrational but that I was fearing unreasonable consequences and that I have been in disagreement about how the content was handled. Yet I do not agree with your portrayal insofar that it is not something that fits a Wiki entry about Less Wrong. Because something sounds extreme and absurd it is not wrong. In theory there is nothing that makes the subject matter fallacious.

Yudkowsky has declared the many worlds interpretation of quantum physics is correct, despite the lack of testable predictions differing from the Copenhagen interpretation, and despite admittedly not being a physicist.

I haven't read the quantum physics sequence but by what I have glimpsed this is not the crucial point that distinguishes MWI from other interpretations. That's why people suggest one should read the material before criticizing it.

P.S. I'm curious if you know of a more intelligent and rational community than Less Wrong? I don't! Proclaiming that Less Wrong is more rational than most other communities isn't necessarily factually wrong.

Edit: "[...] by what I have glimpsed this is just wrong." now reads "[...] by what I have glimpsed this is not the crucial point that distinguishes MWI from other interpretations."