Chocolate has rightly been called "the food of the gods", but is it really? Not all Chocolate is worthy of this exalted name, but some definitely is.
Chocolate is usually rated as the healthiest food because of its high flavanoid content. Flavanols reduce inflammation, which is implicated in heart disease, dementia, and depression.
So, chocolate -- in its essence, without the dilution of too much sugar and milk -- is a very good thing to consume regularly. However, for the greatest benefit and the least harm, especially for those of us who are sensitive to sugar, we need to be finicky about what kind and how much chocolate we consume. (I prefer the chocolate bars that are 87-90% cocoa, which produce the best energetic euphoria.)
On the other hand, there are some ways chocolate may be ingested that are just plain stupid.
Chocolate is worthy of savoring with our taste buds and is best digested and assimilated through our stomach and intestinal lining, not via our nasal passages. Vegetable matter, like tobacco snuff and chocolate is inefficiently absorbed, so why do it?
Doing things that are "fads", because they are faddish, bypass our normal conception of what makes sense, but we do them anyway, to see what it's all about (like the Cinnamon Challenge or the Ice-Bucket Challenge).
Quality, not quantity should be another guideline of any pleasure of the senses. Too much chocolate, especially of the common highly sweetened kind, would be bad for the diabetic metabolism (as well as their teeth). Chocolate for diabetics, in particular, should be a rare pleasure, enjoyed sparingly (while avoiding unhealthy adulterants, such as excessive sugar).