hmm sounds a bit weird to me, if u customize it right so that a member gets 1 rating for a reply and 3 for a thread there shouldnt be any problems imo.. its the same as having a post counter.. some ppl might not like it beacuse they dont have a lot of posts.. it represents the loyalty of your members and if they aint loyal/active then thats their problem right?
anyways its the peoples personal opinion on being rated (which represents their own activeness and loyalty 100%) I dont think there's much I can do about this