Watching One's Language

In July, Amazon reviewer Cyndi Bandy posted this review of THE SENSE OF DEATH:

"Very well done. Kept my attention. Intelligent; well written. Would love to see the next story. ... Only 1 word of criticism; can't stand the f word. This is not necessary to convey the emotions & thoughts of the characters. In my opinion, it cheapens the context & limits your audience."

Cyndi's was not the first review to comment on this. My (fortunately few) negative reviews seem to fall into three areas: "I wish I knew more about Ann Kinnear," "This wasn't a mystery!" (I have since ensured that it doesn't appear in the Mystery genre in online retailers), and "Too much profanity."