Propylene glycol is a solvent, and there is a natural hesitation when it comes to the idea of breathing in a 'chemical'. There are over 4000 chemicals in tobacco smoke, nearly all of which are more harmful than propylene glycol. Yes, of course it isn't ideal and we don't know much about the long term health risks associated with inhaling it, but surely one chemical is better than 4000?
People may be happy to be seen as a fun kind of tipsy at a party, but nobody wants to be a drunk-driver.... Playing with our own safety is something that must remain personal choice, but the second it endangers somebody else, anybody else, this is the time for the state, and society, to step in. Smoking anywhere in public must become as unacceptable as drink driving.
Electronic cigarette use is rising, with Action on Smoking and Health estimating that there are now 1.3 million current users of e-cigarettes in the UK. This number is almost entirely made up of current and ex-smokers, with perhaps as many as 400,000 people having replaced smoking with e-cigarette use.