No one, directly.

Indirectly, undermining our own credibility when we try to foster a rule-based order that doesn't require constant resort to expensive (in both lives and treasure) applications of hard power, OTOH, will have a cost.

> And is that cost less or more than the cost of hundreds of thousands of opioid deaths?

It doesn't matter, because this campaign won't in any reasonable scenario prevent hundreds of thousands of opioid deaths, it will just add a bunch of deaths from international armed conflict on top of it.