My initial reaction to this reminds me of few weeks ago regarding certain youngone who wants to try be cool by 0nic vaping, and a lot of us tried to talk some sense to him.
True, 0mg juice means she probably doesn't have nic addiction - but the oral fixation might be a little bit of an issue. Hopefully, if things do go south, she won't turn into a smoker.
Ethical, or unethical... well, it all comes down to one thing. It's a matter of a choice, and it's her choice to either smoke or not smoke. We all had choice when the most of us, if not all, chose to smoke, and some of us still do. If she choose to smoke because she can't get over her oral fixation - then you are partially guilty of that sense. But it's her choice, really.
Due to current general consensus regarding smoking and vaping all toghether still lies beneath me, so I can't help myself really to say "avoid vaping if you can" - even though it's theoretically to say that vaping is safer than analogs. So there's my answer. I personally think it's a wrong doing, but not to the extent to an unethical behavior worth charging someone for.... yet. However, my opinion, really doesn't matter. Because opinion is like you know what... everybody has one.
