After Steven Greenhut began to occasionally puff on cigars while arguing politics and sipping bourbon with friends, he researched the potential health effects of this habit (the cigars, not the political arguments or booze). Much information seemed designed to scare aficionados, rather than to provide a dispassionate review of the facts. 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. The same dynamic is seen with marijuana and weight issues, writes Greenhut, and now we're seeing it with e-cigarettes too.