Re: Just so I understand their complete ignorance of epidemiology
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.
If you're really that worried, why aren't you and all the other worry-warts fucking well campaigning against exposure to far the higher levels in industry, music and theatre? An e-cig exposes the user to less than 1% of safe industrial levels. IOW, you can be exposed to more than 100 times as much from the legal limit of stage smoke at a rock concert, stage play or in a factory.