It doesn't seem there's much I can say that hasn't already been said: the comm seems to have been intended as a pg-rated haven, and the term "slash" misused. I'd ask to be sure. Perhaps the founders should just be informed of the image they're projecting, and that might be enough to make them think. You may wish to get a response before requesting that they withdraw your fic, and request that they start asking authors before adding fics to their community. Perhaps they'll surprise you with innocent intentions.