.... It's a matter of ethics, morals, and common sense--not regulation, business, or otherwise.
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Precisely. How would you feel if you sold an e-cig to someone underage on accident who never smoked before? Now they have a nicotine addiction. It may be because they lied, but at the same time it's because they used an electronic cigarette.
Same thing for analogs, I understand, but none the less as businessmen we need to be responsible and try to minimize our effect on youth and non-smokers.