Thank you very much for your post. I myself have raised the same issues a number of times on this forum. The problem is mainly that some here don't seem to understand basic Science (biology, chemistry, and physics). High school chemistry, as you correctly point out, is sufficient to debunk most of Ellis's claims on its own.
Actually, maybe the problem is deeper than this. I see an unwillingness to accept logical arguments and to look for the facts (if any) that back up some of these outrageous claims. I suppose it's that people are looking for "miracle" cures; when they don't find what they're looking for in modern science, they turn to alternative medicine, and are thus easy prey for people like John E.. What I find especially disturbing about many of these machines is that the manufacturers claim that they have discovered some property or "energy" that, for some reason, mainstream scientists don't want to acknowledge. They accuse the scientific community as a whole of "hiding" this knowledge from the public, when it can "save lives." This is a typical marketing scheme by these companies to substitute their version of the truth for what we know (and have verified countless times) of the world through scientific means. Science is victim, not a villain, in these scams.
In the end, it is, in my opinion, the people suckered into buying these machines who lose. Promising all sorts of "magical" cures and effects, all they really do is efficiently part people from their money. Sure, the machines distill and purify the water, but the technology to do that has existed for quite a while and devices to accomplish this can be cheaply had. It is clear that basic Science education is failing in some way for a significant group of people; otherwise, these machines would not be bought and their makers would go out of business in short order. Spread the word: science works, outrageous claims do not.