Lets say someone posted something in the discussion board that was very well thought out and executed, informative, properly cited, just all around a good post.(sometimes hard to come by on that board) and I wanted to say "hey great post man" would I get infraction for not contributing to the thread?
Any post not contributing to the discussion is beyond useless, it actively degrades the board. You can always PM the user, or make your own post explaining why you agree and confirm someone's opinion.
Meta discussion of any kind of not allowed.