Aaaand there is peer-reviewed work on secondhand e-cigarette exposure, vis, nicotine contamination is a thing, although that study found no 'combustion products' picked up secondhand.

A quick google says they're also *banned* by the FDA in the states, concerns about the unregulated ingredients, and several early studies in damage to the smoker themselves. I think Professor X might be pissed, yes, but anyone accusing kaberett of being unscientific or expecting her to do her *own* experimental research on it, when there's peer reviewed work out there and the FDA think they're dangerous is a person of dubious reliability.