The ANTZ really have no ammo from this type of activity. Yes, it is irresponsible, dangerous, and wow, it is already illegal. Research your state laws, it is illegal on public roads to do anything that takes away from the focus of driving. Drinking (anything, not just alcohol), eating, reading, putting on make-up, reaching for cd's, changing clothes, shaving, any sexual acts, etc etc etc. As a professional driver I have seen it all. People die every day doing something there is already a law imposed for so as to protect them from themselves. The bodies and parts of bodies are hard to forget.
Hands in the 9 and 3 position, anything that prevents that is not legal.
Of course I drive with one hand on the wheel, one grasping my vape (death grip, if I wreck I don't want to lose it)
When driving a semi I shift gears while holding my vape. Habit.