That's an interesting question

You said "What if an "Ask Expert" started to suggest that drinking 1 oz of gasoline daily will cure you of cancer? To me this is obviously dangerous and would likely kill someone. Should I call for the "Ask Expert" to be expelled from the Curezone or should I do as I advised in previous threads and disagree with and vigorously question the "Ask Expert"?"
In the case of an established "Expert", I would say that your usual course is the obvious one. I am, however, surprised to learn that you got away with that.
I have done the same on a number of occasions and the result has ALWAYS been either post deleted or a ban. On one occasion, even Shelley had posts deleted for doing just what you have advocated.
I view the case of MH rather differently. This was a person who had extremely "odd" views; for example, "humans dont need food" and "water is a poison". Such views are at total odds with the majority of other "experts" views and against every scientifically proven fact we know. Despite that, this person was selected to be a CZ expert. Do you not find that bizarre?