Okay, I'll put myself on the chopping block here for the sake of defending whichever community RP that is: his/her community, his/her rules. Sucks if people don't agree with it, but there's a really simple solution: Don't play in it. I'm sure it's not the first RP community that has banned yaoi/yuri, nor will it be the last. There are plenty of other communities that are completely gung-ho about homosexual relationships, and in turn, there are allowed to be communities that don't wish to have that dynamic as a part of their group. Much in the same way there are strictly het-players and strictly slash-players, it only makes sense that there are groups that reflect these preferences so no one should take it as a personal slight that they would exclude someone based on preference from a recreational group, especially when and if the canon gives no support to a same sex pairing. Of course I could be completely off base because I don't know which RP this is, but that's just my two cents.