It also sends an unintended signal: "This community is more interested in putting up with core-demographic provincialism for the sake of avoiding flamewars between the majority; folks on the periphery are better off not even trying to point it out, analyze it, or correct it."

I'm not completely sure what you mean by "putting up with core-demographic provincialism" - I assume it's the "Yay hard sciences boo humanities!" subtext, no?

And I have no idea of what you mean by "flamewars between the majority" - flamewars dividing the majority? Flamewars between LessWrong and the rest of the world?

(For context, I'm French, so I may not have a clear idea of what kind of things signal what in an American context)