I would imagine the extent to which a dreamer would accord respect to a DC would be based, at least in part, on your personal belief as to whether they are autonomous, conscious forces or beings. If they are, are believed to be, or can be shown to be mere creations of our own subconscious with no more "reality" than a cartoon drawn on a piece of paper or a hologram, then the respect, and/or "morality" of behavior accorded them in your dreams would likely change.

Since I've been unable to chose between these two views as to what DC's really represent, I've chosen to err on the "respect" side. Sex (as in real life - for example) would only be consensual with a DC.