After all, people painted the walls and enhanced their gas with cyanide in large quantities for years before even realizing it had to be carefully handled so they are basically the same risk in the typical mind.
The problem is free cyanide is extraordinarily dangerous in the air and you'd likely kill a lot of people before someone realized what was going on with the battery, not just that people eat batteries. Even lithium batteries honestly get pretty close to not being worth the risk for consumers, cyanide is still a bit of a step after that yet.
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After all, people painted the walls and enhanced their gas with cyanide in large quantities for years before even realizing it had to be carefully handled so they are basically the same risk in the typical mind.
The problem is free cyanide is extraordinarily dangerous in the air and you'd likely kill a lot of people before someone realized what was going on with the battery, not just that people eat batteries. Even lithium batteries honestly get pretty close to not being worth the risk for consumers, cyanide is still a bit of a step after that yet.