Yeah -- something I hadn't really considered until answering one of the other comments above is that the way I rec is heavily influenced by the way that I treat recs as a reading list without paying much attention to the actual content of the rec (i.e. if I know the reccer well enough to have a general idea of their reading tastes and I know that they liked a story, that's good enough for me). So it doesn't really occur to me to think that some people would use recs to warn them away from certain dislikes (lousy grammar, etc).