"If I am not mistaken - Canada has banned the sale of e-cigs with nicotine. Singapore has banned it. I am sure you can google it - but this what I found:"
Very weird. I wonder are there folks in those countries doing bathtub nic extractions, or selling nic under the table.
I am sure I wouldnt care what the laws are of the country I was in were, if following them would kill me (ie give me cancer from smoking). I aint dying for a stupid law.
In most cases, I would assume these "bans" are actually existing laws, such as the classification as a medicine or poison, of nicotine, or the requirement of an approval process for new consumable products
(Ie its more to do with either initial resistance or law out of dateness, rather than specific newly sought bans ....)
For example, in australia nicotine is classified as a poison. But you can still import it.
In new zealand, it may or may not be classified as a medicine requiring approval (which ruyan is going through), but you can still import it.
Neither of these countries have bans, and you can still use an e-cig, its just not as well known or available, due to out of date laws - which presumably wont be adapted until more people use them, or complain about the laws.
In canada, the nic e-lquid requires approval before it can even been imported, sadly (but not the devices). But theres nothing to stop someone applying for approval, so it hasnt been "banned" as such, as draconian as their ruling is (they could apply just like ruyan has here in nz).
It seems completely ridiculous to deny a product with less harm (ie harm minimisation), simply because its _exact_ level of harm is somewhat unknown (although ruyans studies so far are pretty darn revealing IMO).
But I guess thats whats happening in some of these cases.
Actually reading wikipedias electronic ciggerette page was quite eye opening.
I had no idea so many countries had some many weird laws on the things. Singapores case sounds bizzare. And a few other places seem to have actually outright banned it also, based on some mere association with tobacco. Very strange.
They are mostly kinda "different"

places, like mexico, arab emirates, singapore etc (I may have just listed all of them

, not sure, lol)
Very educational googling, but still, in 95% of cases, its either a yet to be passed approval process, or an existing outdated law.
But there are some, perhaps shall we say, less progressive countries, where its actually some weird guilt by association with tobacco though.
Id say when it comes to the USA, id expect that it will not be banned, but I would expect some kinda regulation though. And maybe one thats overly heavy handed. Maybe even taxing.
From a personal POV:
Here in new zealand, we are in the middle of passing a harm minimisation law that will allow low risk "legal highs" to be sold legitimately, taxed, over the counter, r18 etc, if they pass an extensive safety testing process.
So we are kinda losing the puritan illogical mentality, and going slowly into the harm min mentality (and weve had a "conservative" government during all this process too)
I doubt anyone here would argue that the safety is an issue, given we know cigarrettes kill and with good predictability.
But smoking is still _hated_. Theres a big anti-smoking lobby. So only thing that may get in the way of e-cigs here is this "vaping normalises smoking, and may be attractive to teens" nonsense that anti-smoking folks will want to push (even though theres no evidence for this _assumed_ and fairly illogical argument).
I totally doubt that will ever stop e-cigs in general here, given they for sure save lives, but its a pain nonetheless that this sort of thinking will slow our process towards a decently written legal framework for e-cigs here.
And thats what you need- a good law that _legitimises_ the product, allows its sale, use and importation, because once something like that is written it tends to stay that way.
With this in mind, I wouldnt be _too_ unhappy that the US is seriously considering regulation. Its an inevitable step, and a nessasary one. No product stays in legal no mans land, and every new product gets the legal look over at some point.
Id be more concerned about the precise nature of that regulation, and if I were a US citizen, id be kicking up a fuss about it, making submissions, keeping up to date, writing to politicians with good arguments etc.