Now, I don't like those beliefs at all. I do think that LC made the right decision though. Inclusiveness is a good policy, and no matter how certain more authoritarianly inclined progressives are spinning this, that's what this is. Assuming no one is threatened, and he isn't promoting his politics, he should have a chance of going through the (anonymized!) entry process and talking about the really weird and awesome Urbit.
[1] http://unqualified-reservations.blogspot.fr/2009/07/why-carl...
edit: One of my main philosophical issues with Moldbug (besides the repugnancy), is that he is internally inconsistent. He might refute that later on. I dunno, he's spewed out literally tens of thousands of pages of text.
I assume you mean LambdaConf, not StrongLoop.
I assume by SL you mean LC?
Neoreaction is just another form of asshole-ism in the blogosphere.
People have strong reactions to it and thus its proponents should not be surprised when their belief colors other peoples' judgement of them when they want to talk about something unrelated at a conference.