Re: Just so I understand their complete ignorance of epidemiology
"generated in any meaningful (or even detectable, in most cases) measures, eh?"
That's what long term health studies are for - to see if 'meaningful' amounts are the safe limits. I'll accept there oughtn't be a significant risk on the basis of the known chemistry and the actual temperatures involved
Now if the sequence goes 'smokes cigs for years, switches to e-cig with nicotine for year, switches to nicotine free for a couple of years, throws e-cig into bin' then the short term studies done to date would seem to indicate that e-cig is a safe strategy for giving up cigarettes.
If it's 'smokes cigs, switches to ecigs for the next 20 years, gets some lung/airway disease due to tiny amounts of something in the vapour' then it's a risk that ought to be known even that it's still much lower than smoking tobacco.