Honestly I've only ever been in the periphery of the Touhou fandom because Touhou is kind of a tough thing to really get into. I guess it doesn't surprise me that the fandom is Like That because the otaku community in general is Like That, but I just never got that impression from Touhou specifically enough to really single it out like that.

Both of these things being big fourchan things for some incomprehensable reason is probably not a coincidence.