Vaping Ban On Health Grounds

Something that nobody tells you when you switch from cigarettes to e-cigarettes is that because you are inhaling nicotine, you actually get more from the e-cigarette than you do from smoking a cigarette because you don't know when you have had a cigarettes worth and you just keep inhaling and the result of the extra nicotine is some very funky dreams.
Usually quite fun, they can be very vivid, lucid and weird dreams especially if you have a good blast before you go to bed but the flip side is the nightmares are also much more terrifying as i found out which can be very, very scary.
Apart from the weird dreams, generally e-cigarettes are considered harmless and the NHS are even considering offering them for free which makes he ban by San Francisco on health grounds a bit of a strange one.
Inhaling nicotine is not dangerous in itself especially when compared to the many poisonous chemicals contained in tobacco smoke and nicotine does not cause cancer unlike tobacco in normal cigarettes and doctors, public health experts, cancer charities and governments in the UK all agree that, based on the current evidence, e-cigarettes carry a fraction of the risk of cigarettes but it is the 'based on current evidence' where San Francisco have got the jitters.
The ban is to stay in place until their health effects are clearer which echoes the ban in Australia which is reviewing all the available evidence of the health impacts of vaping and e-cigarette liquids.
As vaping is still very new and the effects are unknown then it is probably correct that a full review is conducted but i have always had two other fears over e-cigarettes which are hard to argue against.
The first is that the e-cigarette companies are aiming their wares at the under 18 market. Hard to argue when you see flavours such as ice cream, bubble gum and candy floss while the second is that the 'safe' aspect of vaping is tempting people to try smoking who would not have necessarily have and i've met people who have tried vaping, liked it and then tried a cigarette.
The best course of action is to not smoke at all and e-cigarettes are great for smokers who are addicted to nicotine already but there should be the concern that they do prove attractive to non-smokers and the under-age and i have seen myself them act as a gate-way to real cigarettes.
Inconvenient for vapers but until the evidence points conclusively one way or the other, i can't blame San Francisco for the ban.