My other thought-experiment solution would be mixing in lethal substitutes for ivory/rhino horn/etc. early in the supply chain, with the goal being deleterious

My other thought-experiment solution would be mixing in lethal substitutes for ivory/rhino horn/etc. early in the supply chain, with the goal being deleterious effects on end users, reducing demand. Although it would be more ideal if it actually killed people involved in the supply line, but there are too many unwitting couriers (common carriers, etc) to make that reasonable. A more palatable version of this would be a campaign about pre-existing health consequences of using this stuff in TCM, followed by flooding the market with synthetics claimed to be safer/more efficacious.