Perhaps it's because they're not controlled by their friends in the pharmaceuticals industry? Whatever, it certainly isn't because they don't work:
What sets e-cigarettes apart from other non-traditional nicotine delivery systems is that it has a high conversion rate, meaning that ‘smokers’ are less likely to return to regular cigarettes—a trend not enjoyed by other non-burning nicotine outlets like patches...Update:
A clue comes from the latest piece of deranged ideological nonsense from the World Health Organisation:
...Parties may also wish to consider whether the sale, advertising, and even the use of electronic cigarettes can be considered as promoting tobacco use, either directly or indirectly. Regardless of whether or not ENDS contain nicotine or tobacco extracts, they are used to mimic smoking, which could be considered as a (direct or indirect) promotion of tobacco use."
That's it folks - e-cigs mustn't be allowed because using them looks like smoking. It doesn't matter if thousands of smokers are escaping the damage of cigarettes through 'vaping'. It looks like smoking and might:
"...undermine the denormalization of tobacco use."
We truly live in a mad world when a product that can help people quit smoking is banned because it looks like smoking.