You get downvoted because you're implying substances like methamphetamine are common in vapes (as per your linked article), which it obviously is not, and already highly illegal.

The truth is you can mix your own vape juice from just PG, VG and nicotine. Which are completely harmless to eat (except nicotine) and used in food products. A more rational discussion would be about if inhaling PG and VG is harmful to the lungs, or the additional unregulated stuff you find in flavoring of vape juice.

I would dearly love to know why I get downvoted for providing concrete evidence of serious problems with controlled drugs in vapes.