Anyone used electronic cigarettes before on public transportation?

I am very curious about these. In particular, are you allowed to use them on a train or airplane? I mean, if the train conductor saw me using an electronic cigarette, would they give me a high-five or kick me off the train?

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Has anyone used the electronic cigarettes to quit smoking? Does it work?

I am trying to find an effective way to quit. I have looked into electronic cigarettes and wondering if it works to quit? If so, which ones are the best brand to go with?

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