I think it's a stretch to say that just because the item fits easily within your palm it's, "clearly intended for teenagers to be able to get access to nicotine discreetly while still in school."
It isn't shown as "cool" in movies like it used to be, so adults who are "set in their ways" are lacking most of the remaining peer pressure tactics that typically works for adults.
Wait for vape scenes in the movies. You can be reasonably sure there's a lobby group working towards it. How about a "FBE Teens try different healthful Vape Flavours"?