There is not even any theoretical reason to think any of this.

> And what if the device isn't safe in some way? What if it's likely to explode?

"What's Causing Some E-Cigarette Batteries to Explode?", NBC News, 2 months ago

http://www.nbcnews.com/business/consumer/what-s-causing-some...

> Or the way it vaporizes things can tend to produce some sort of unexpectedly toxic chemical perhaps only with certain vaping fluid?

The contents of the fluid was unregulated, so how can you say that's not even a theoretical concern? A quick Google search shows a TON of recipes which could easily cause problems. How can you be sure that some fluid works fine with most e-cigs but when used by one that runs a bit hotter it doesn't cause a fire or have some chemical reaction between components that generates some dangerous gas? What if the fluid somehow reacts with the plastic or metal inside your specific e-cig?

> Dosage of what? The contents of e-cigs has been unregulated until now.

And it's not like anyone has ever seen cases of normally safe products made in an unsafe way put on the market.

http://time.com/107922/china-pet-food-contamination-recall-v...

http://www.telegraph.co.uk/news/worldnews/asia/china/8944028...

http://www.aboutlawsuits.com/lumber-liquidators-halts-chines...

http://ecowatch.com/2014/03/18/toxic-hair-straighteners-inte...

Likely != some

Of course some batteries explode. Shall we also ban laptops and cell phones?

As for content of the juice, sure there has been a few incidents of chemicals discovered to be potentially unsafe, but that's a far cry from " tend to produce some sort of unexpectedly toxic chemical". (What does that even mean, it sounds like we live in pre-scientific times and the world is a completely mystery to us.)

> How can you be sure that some fluid works fine with most e-cigs but when used by one that runs a bit hotter it doesn't cause a fire or have some chemical reaction between components that generates some dangerous gas?

There is no theoretical basis in chemistry to believe this, and there is extremely widespread usage of ecigs with no incidents.

But sure, anything in the world is possible I suppose considering you cannot prove a negative. I'm going to start wearing safety goggles when using my computer in case the screen explodes, after all, even though there's no theoretical reason to fear this and no incidences of it happening, it could, couldn't it. :)

You are so vociferously defending ecigs, i have to ask, why? They are clearly not good for you, and have been taken up by the market sources that successfully obfuscated the dangers of tobacco for many years. Are you being paid in some way by a pro e-cig group, or do you sell them?

It appears there actually may be a plausible theory:

http://chemistry.stackexchange.com/questions/14771/how-does-...