Governments and their anti-drug laws keep the inhumanly violent drug cartels in business, which would logically make the cartel chiefs violently opposed to anarchists. Just as drugs being legalized takes money from cartel coffers, so does a government-less town, or county or state. The cartels kill ordinary Mexicans for the hell of it, so surely they'd have no reason to let those who are "stealing" their $$$$ live in peace, especially when they would be woefully unprotected against the formidable cartel armies.
How do the people living in these Mexican anarchist towns you are documenting protect themselves from the heavily armed cartels, who would see them as mortal enemies for interfering with their lucrative business set-up, due to the cartels' working relationships with installed governments enabling them?
And even if the cartels aren't attacking them now, an increasing number of these anarchist towns also increases the cartels' losses. Their desire of wiping these people out at some point is inevitable. So how do anarchists deal with powerful, brutal enemies determined to run things their way, that aren't a government? Or at that point does one relent and become one with the cartels rules or laws, because they have no choice, therefore being forcibly required to give up their freedom, again?
Won't there always be powerful, evil-minded, selfish, jealous, (and violent), groups of people that will band together to make sure they call the shots, whether it's on a local or even the highest levels, and couldn't care less whether they are called a government or not, and are serious about wiping out all opposition?
How does anarchy prevent this, or stop it from happening? It is human nature for a certain sector of humanity to crave power and act with others to get it.