A Hacker News discussion revolves around a UC Davis study revealing elevated toxic element emissions from disposable e-cigarettes. Commenters point out nuances often missed in simplified headlines. One user argues vaping, despite potential risks, is a harm reduction tool compared to cigarettes, citing lower levels of carcinogenic compounds. The discussion also highlights the popularity of disposable vapes among teens, who may not be seeking harm reduction but rather easy access. Some suggest disposable vapes, often manufactured cheaply in China, may lack the safety standards of rebuildable vapes with replaceable components. The study identifies leaded bronze in non-heating components as the source of lead. Several comments also criticize the study's headline as misleading, pointing out that high lead levels were primarily found in products from one manufacturer. They emphasize the importance of education and informed choices, advocating for safer, rebuildable vape options for adults trying to quit smoking rather than discouraging vaping entirely based on limited data.