When one has had enough from another poster on a public message board, I think the most polite thing to do for the benefit of all is to look to the above right on that page and click the red "ignore" button.  That way, you can self-censor your readings to see only what is most likely to bring you the reassurances you are seeking, at least until you are surprised by something and left wonder what happened.  

Another option is to avoid posting arguments or questions of a poster who annoys you.  Simple, no? 

VP