Here's my way of thinking. Where do her columns run? World Net Daily. Front Page magazine. No one who isn't already in line with Ann's way of thinking would read either of those publications. She's managed to get her writing dropped from publications that do actually reach people who disagree with her (even prior to the Sept. 11 'convert them to Christianity' comment) because of factual problems and her tendency to write the same things over and over.
I believe that the point of opinion writing is to convince people, not preach to the choir.