I wouldn't think so. They don't sue a newspaper review for use of the book's title or character reviews, now do they? If they do... then... I'd better put a stop to some upcoming Newspapers.
I don't have a great knowledge of the law on this subject (or, indeed, any subject), but I think that, if the Tolkien estate ever found this site then it might be considered free advertising. Countless are the books I have bought because of this forum.
