His comment raised the hackles on the back of my neck and my thoughts turned dark. I visualized the bold headline: “Author Attacks Book-Signing Attendee!” With a slight shiver, I decided it best to continue smiling, nodding and change the subject at the earliest possible moment. People had begun wending their way toward a seat in the outdoor pavilion, the event nearly ready to commence. An elderly gentleman accompanied by his wife most likely wished himself home watching a baseball game on T.V.  I’d already listened to him insult her earlier in a condescending tone of voice when she asked him a question.  I watched out of the corner of…