Using ratings even if the purchase does not go through?

Has anyone here considered using the ratings for items that they end up not purchasing? I have had numerous people not respond to an ad that I have inquired about, or have been VERY lite on communication only to respond days later to a previous email, and not address question(s) in my latter inquiries...

I have often thought of using the rating system to identify users that if they finally end up responding, I would simply tell them that I am no longer interested... I guess that is another pet peeve of mine...