Well, since you took the time to write something out i read all of your post. To start with I certainly never claimed replies 'must be polite' I simply asked responders to be civil to each other since I am looking for a discussion and am interested in why people have this view. I have seen, and am aware of how these conversations generally go. So i was trying to start things off on the right foot.
I would also suggest you are anything but polite, given you barely read two sentences and immediately posted something rather passive aggressive with no true substance that added nothing to the conversation.