Re terminology, have got to disagree. Regardless of whether ATC pass an instruction or a request to you in Class G, it would be gross bad airmanship to not acknowledge.
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I didn't even hint at "not acknowledging" any radio transmission in my post on terminology, so where did that idea come from? Did you actually bother to read and understand what I wrote before posting your disagreement with it?
Mind you, if I was flying non-radio (which I do a fair bit of the time, for purely practical reasons associated with having no electrical power) then I wouldn't know that any ATC unit was trying to talk to me, and wouldn't be able to acknowledge any call. Of course, I'd question the wisdom of flying non-radio in an area as dodgy as this, but it would be perfectly legitimate, if very unwise IMHO.
VP