Earlier quoted context omitted.
But the competitive advantage of druglords is controlling the means of distribution, not the means of cultivation. So, SilkRoad could help bypass those monopolized distribution channels and undermine the druglord's competitive advantage. For example, if a druglord is competing directly with a mom-and-pop drug cultivator on SilkRoad -- the drug lord has higher costs (bribery, paramilitary force, etc.) and only margina…
The druglord would wipe out the mom-and-pop cultivator and happily live ever after with their higher costs.
I mean, cartels have been pumped up to pretty ridiculous heights by the war on drugs but it's not at the point where it would be realistic to have them say "here is a list of a few hundred usernames from SilkRoad spread out all over North America. Find them and murder them all."
Even considering that their MO is more along the lines of picking out the ones they can find and making a gruesome spectacle to scare the rest it still seems unrealistic, although so do a lot of things happening with drugs cartels these days to be fair.