Then maybe you'd care to explain why this is an area in which you think government intervention (at the federal level, no less) is warranted, especially when 1) the vast majority of vendors have already chosen not to sell to minors, and 2) most of the states already prohibit it anyway? Seriously, how shocked can you be about people opposing a federal policy that's essentially symbolic and superfluous, and will do nothing to materially benefit anyone?
[Edit] One more question: You do realize, I assume, that there's no federal age restriction on tobacco and/or smoking? So, Washington is content to let the states decide for themselves who can buy real cigarettes (which actually kill people), but they feel it necessary to establish a federal-level age restriction for e-cigs? Frankly, if you can't understand why this is complete stark raving insanity that makes no sense whatsoever, then I'm the one who's shocked here.
Yes I realize there is no federal age restriction laws and that it's up to the states, but I feel there should be. Disagree me and be shocked all you want, but I honestly have no problem with an age restriction on buying cigarettes. While I will never consider e-cigs tobacco products because, obviously, they don't contain tobacco, I also am in favor of limiting the sales to minors, it is what it is, we'll have to agree to disagree on that.
We have different views on nicotine use by minors so it is what it is.