The "Drug Trafficking Organizations" are the cartels. It is important to remember they don't exist to traffic drugs, they exist for the top leader(s) to obtain and maintain power, like a state-in-waiting. As other activities become more profitable, they switch over to those. Marijuana loses its profitability, they can switch to other drugs, guns, smuggling, "coyotes", or legitimate enterprise. This is what unfettered…
I'm not sure how you can say hierarchical organizations that use violence/coercion are in any way anarchist. Anarcho-capitalism requires voluntary engagement in a system of contracts and so forth. (Whether that could actually work in the real world is debatable but beside the point.)
I'm suggesting that a corrupt state, which cannot prevent the rise of a counter-state power like the cartels, and the evolution of anarcho-capitalism are similar.
The flaw I see with AC is that once the private police force and the private court system in an anarcho-capitalist state combine, there is nothing to prevent them from coercing the organization's will on all around. This is a de facto state. Given that this state may not have primacy, other groups may oppose -- civil war in a supposedly stateless society.
My thought here is that the cartel is the counter-state to Mexico, a state-in-waiting/hierarchical body capable of providing similar "services" that the state typically provides -- defense, mission-definition, communication access, as so on. Whether or not the people under their thumb agreed to this transfer of power is not really necessary to consider, as it is the circumstances at play.
Anyhow, my two cents.