I'm not a parent, but for me it would depend on the situation. if he/she tried it because they were ALREADY smoking, I'd be like "go for it! hell I'll even buy you some refills! anything to keep you off the real thing!" also, being that I have autism, it's very possible that when I DO have kids they'll have it as well. I bring this up because I would rather give my kid nicotine to treat autism than any of that nasty crap big pharma tries to shove down their throats. nicotine is shown to have a positive effect on all kinds of people with cognitive issues such as autism or ADD. don't get me wrong, nicotine HAS made me feel sick before, hell about an hour ago just now I had some snus and 20 minutes after I spit out the pouch I barfed, and in those 20 minutes I was dizzy and nauseous (I'm fine now). however, when I look back to my childhood (which was for the most part good), I remember all the crap those pills did to me, and I gotta say a little vomiting was the LEAST of my problems. Concerta made me hallucinate, geodon made me so tired I was out of it all day and made it so I wound up going to bed at 7PM and waking up at about 4 AM, Adderall was the worst of them, it made it so I couldn't eat, and at one point I weighed like 90 pounds and was getting about 2 hours of sleep a night because of it. I was effectively forced to take that monstrosity when I was 14 years old. So if my kid has ADD or Autism and the doctor starts throwing pills at me, we're going to take a little trip to walgreens and buy a low strength nicotine patch instead, and maybe incorporate vaping with a PV that looks as little like an analog as possible. If I ever have kids I will NEVER put the through the hell I went through.
now with that being said, if I caught my kid vaping just because he/she thought it was cool, my reaction would be about a 4/10 if it didn't have nicotine, but about an 8/10 if it did.