Yes, the Washington state vapor product tax continues to apply, unfortunately
Before we review this factor, lets first examine what one might consider the main ingredient of a cigarette
Among those who survive, permanent brain damage, hearing loss, kidney failure, loss of arms or legs, or chronic nervous system problems can occur

They report, In general, these studies confirmed the relatively low toxic potential of [aerosol] PG, administered by various dose routes, including the inhalation routein the dog, no histopathological effects on the [larynx, trachea and lung] tissues were observed. The investigators noted decreases in some assessments of red blood cells in dogs treated for 28 days, but these effects were not clinically significant in the dog and had no effect upon their activity of health, and the values still within the normal historical ranges for dogs of this age, strain and sex. Werley and colleagues added that, overall, PG inhalation exposure in rats and dogs produced quite limited toxicological findings, and allowed us to conclude that [aerosol] PG exposures could be conducted safely in man by the inhalation route This study assessed the effects of short-term exposure to PG vapor, but the effects of long-term (months or years) exposure are unknown and unknowable

While these rules may change as legalization efforts continue, for now, pilots cannot smoke weed or consume marijuana at all
put an inline fuse going to the lighter, mount it anywhere and run a ground wire to it