How do you deal with this, if it is a problem?
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You have two choices:
(I was bored and wanted to try out OpenOffice Draw)
As far as them never responding, if you post a reply that adds to the discussion with additions, corrections or alternatives, it doesn't really matter if the person you were replying even sees it, nevermind replying. It will still benefit plenty of other people that come across the discussion.
This answer might also apply.