[argumentum]

“The very thing that could make them effective is also their greatest danger,” said Dr. Tim McAfee, director of Office on Smoking and Health at the Centers for Disease Control and Prevention.

It's exactly this kind of thinking that started and perpetuates the pernicious war on drugs. It's the root of the (proven false) "gateway drug" phenomenon.

The "thing" by the way is the fact that they don't do any harm. How absurd and ridiculous ..