That is a problem with the current state. In a future socialist state we can eliminate it without these issues.

You started this entire thread by saying "Dangerous drugs need to be kept off the streets through any means". Present tense. Any means. Don't play stupid, we don't live in a future socialist state. We live in the existing racist, fascist capitalist one that has demonstrably only used the drug war to create mass systems of enslavement. So why don't you shut the fuck up about hypothetical idealist futures and talk about existing reality? Are you even a marxist with this utopian idealist nonsense?

The only other method that would be anywhere near as a effective would be the government undercutting suppliers by selling at a lose and poisoning it

The fact that this insane fascist tactic is on the table for you is nuts. Why even mention this shit? This is my line, the evil shit the prohibition governments do to its own people in the name of "protecting" them. Why would you go ahead and mention it when it's farcically evil?