Some studies assumed smokers inhaled the stogies and lit up several a day — rather than one every couple weeks. Activists seemed more interested in changing behavior than helping us make informed decisions. I’ve seen the same dynamic with marijuana and weight issues. Now we’re seeing it with e-cigarettes — electronic devices that heat up nicotine-infused liquid to create an inhalable vapor.

The New England Journal of Medicine recently touted a study showing that although e-cigs don’t burn tobacco, the vapor has “high levels of formaldehyde,”…