Yes, the chances of succeeding approach zero, which is why I say that there has to be another reason to write such post. There are several for me. I don't need a response from the person quoted, which is why being on their ignore list doesn't change anything. I'm not really writing to them given the inevitable outcome of the effort. I'm writing to others like you who can assimilate new information and for my own benefit. Writing out why I know is beneficial. I gain new insights at times for the effort and discover better ways to present the same ideas. Once in a while, I might impart new information to such a person, or offer a new turn of phrase others might like.
With that attitude, there is never frustration or disappointment.