[Ingtar]

Silly WHO. The most effective way is to ban their manufacture, sale, and possession. After all, this works for drugs, doesn’t it? Oops, that cuts off the money the Feds make off it. They can always confiscate enough to make up the difference. /s

[ConservingFreedom]

The most effective way is to ban their manufacture, sale, and possession. After all, this works for drugs, doesn’t it?

No, it doesn't.