Don't use the following words in a subject title - it connotes subjective question.
Jeff posted the regex in uservoice (As of May 2, 2009):
Regex.IsMatch(s, @"\bbest\b|\bworst\b|\bhardest\b|\byour?\b|\bfavou?rite\b", RegexOptions.IgnoreCase);
It is important to note that avoiding the above words does not make your question any less subjective - "Best management tool" is inherently subjective - the warning is not there to tell you to avoid certain words, but to avoid the question altogether, or to re-word it so it can be evaluated objectively and measurably so that the answer is the same for everyone in your situation.
This has also been deployed at StackOverflow.