Related, here is something Yudkowsky wrote three years ago:
I’m about ready to propose a group norm against having any subgroups or leaders who tell other people they should take psychedelics. Maybe they have individually motivated uses—though I get the impression that this is, at best, a high-variance bet with significantly negative expectation. But the track record of “rationalist-adjacent” subgroups that push the practice internally and would-be leaders who suggest to other people that they do them seems just way too bad.
I’m also about ready to propose a similar no-such-group policy on ‘woo’, tarot-reading, supernaturalism only oh no it’s not really supernaturalism I’m just doing tarot readings as a way to help myself think, etc. I still think it’s not our community business to try to socially prohibit things like that on an individual level by exiling individuals like that from parties, I don’t think we have or should have that kind of power over individual behaviors that neither pick pockets nor break legs. But I think that when there’s anything like a subgroup or a leader with those properties we need to be ready to say, “Yeah, that’s not a group in good standing with the rest of us, don’t go there.” This proposal is not mainly based on the advance theories by which you might suspect or guess that subgroups like that would end badly; it is motivated mainly by my sense of what the actual outcomes have been.
Since implicit subtext can also sometimes be bad for us in social situations, I should be explicit that concern about outcomes of psychedelic advocacy includes Michael Vassar, and concern on woo includes the alleged/reported events at Leverage.
Related, here is something Yudkowsky wrote three years ago: