Ban them for safety reasons.
Nicotine addicts have plenty of delivery options including lozenges.
Selling products intended for volatile substance abuse is illegal in the UK. Products inherently designed in a way that their normal real world disposal is dangerous make sense to regulate.
Not everything everyone wants to do makes sense for society to permit, including producing flammable products whose nature makes them into incendiaries when broken.
I inert all my expended lithium cells by destruction either in my welding shop or outdoors on my land, then dispose of the metallic slag safely with other mixed scrap metals. Small cells make impressive incendiaries so I'm not surprised cell disruption during recycling of objects containing them causes fires.
I use welding PPE so it's no risk to me and have ample water to flood cool spatter (which I do anyway after welding outdoors). I suggest other Slashdotters (the original techy sort who know how to safely break lithium cells which is quite simple) self-educate so they have direct experience of how powerful small cells really are.