I wouldn't bother trying to talk sense to Dr. Hewitt. His website makes it quite clear that he holds all scientific establishments and most scientists in very low esteem, and would seemingly rather have all scientific findings published without peer review, than run the risk of just one good discovery getting rejected.
The reason? He sees himself as a great cellular researcher who made a stunning discovery about cell surface transport mechanisms, and this great discovery was dismissed and ignored by the establishment, thus robbing him of his rightful place in the scientific history books.
That he was a very good researcher is demonstrably true, he studied at one of the best institutes under one of the greats in the field. He proposed a theory which all agreed at the time had some merit, but which, according to the correspondences on his own website, has no supporting evidence, with all available evidence pointing towards competing theories, to the point that his theory is no longer even discussed. The correspondences are on his website because he was so frustrated about his theory not being discussed that he took it upon himself to write to a large number of senior researchers to ask why they weren't researching his theory. Not surprisingly several of them were quite miffed at this line of enquiry.
During his posts in this thread I believe he has made it quite clear that he doesn't understand that the general public lack any knowledge or understanding of how medicines are developed, and would probably think that "placebo" refers to a group of drugs in much the same way that "antibiotic" does. That they trust that the medicine their doctor prescribes them will be the best available for their condition. He is clearly so intent on grinding his axe that he apparently doesn't care who gets caught between it and the whetstone.