That might be a good idea for (to use your example) FaiChii fans who just want to fangirl/boy over the pairing without the debate. As I said in the FaiChii board, I think the best way to go would be for any pairing threads to say in the opening post that the thread in question is indeed a board to simply fangirl/boy, not to debate the pairing, like the SyaoranxSakura and KuroxFai threads. So, yes, fanclubs are probably a good idea.