> Although this had unfortunate consequences, and would be unthinkable in today's enlightened world, I'm not sure the line of reasoning here was unreasonable.
It is only reasonable for people who believe in social engineering of society to achieve some kind of betterment, even if that includes use of force or actually killing thousands of citizens by poisoning them.
Let me be clear on this, these people that died as a result did nothing other than buying products in a free exchange. No alcohol or drug dealer put a gun to their head and forced them to buy and consume their products.
This is not to say that I believe drugs are a good thing, it's just not my business to tell anyone what he or she should desire or not.
There are many types of Collectivist ideologies out there that believe in engineering societal improvement and they all have one thing in common: They are authoritarian and disregard the free will of individuals. Some might poison products to kill off the undesired or use state force to prohibit certain products, some might send rebellious citizens that think "wrong" to re-education camps (Soviet Gulags) and some might even send them to extermination camps. (National Socialist from Germany)
I reject all of that, I do not care in the slightest about what these Collectivists believe would be an enlightened society and how to bring that about. I'm an individual with personal interests and everyone should stay out of my business as long as I do not harm others.
If you can convince me and others to freely restrict ourselves in a way that could improve society then I'm fine with that.