This may or may not be a correction, but the article describes "rubbing alcohol" under the section devoted to ethyl alcohols. In the US, the only "rubbing alcohol" which I've seen or used is actually isopropyl, not ethyl. To my knowledge, these bottles have no "denaturing" ingredients, since isopropyl is itself poisonous when ingested (re: MSDS). Though not considered a severe threat in general, 8oz. of pure isopropyl is considered a lethal dose. Methyl is a much bigger threat, especially in regard to skin contact, but drinking isopropyl is certainly not a good idea. Perhaps ethyl is indeed used in some rubbing alcohols, but isopropyl is presently cheaper to manufacture and untaxed, thus generally preferred for use in rubbing alcohol.
It is true that "rubbing alcohol" is up to 30% water, which I suspect is added partly to reduce its desiccative properties. However, isopropyl is commonly available in pure form where I live as a "red bottle" automotive fuel additive. Without added water, isopropyl is a reasonable fuel for some alcohol stoves and theoretically has a higher BTU content by weight than ethyl. In my experience, isopropyl will deposit some soot on your pot, so it is not as clean-burning as ethyl. I consider it much safer and overall a "better" fuel choice than methyl and thus recommend it if no denatured alcohol is available. As Roger points out, though, actual "rubbing" alcohol with water added is completely useless as it will not burn hotly.
By the way, in this article Roger seems to ask why it's called "rubbing" alcohol. Well, next time you get a shot in the arm (or elsewhere), that cotton pad they use to sanitize and slightly anesthetize the area is traditionally soaked in rubbing alcohol. They rub it over the area before shoving a needle in you, thus the name. At least that's my perspective.