Yup, older article, read it when it first came out.
Also agree that as a gringo, you were somewhat immune to the innermost country violence between cartels. But that's changed a bit. Witness the attack at a resort in Cancun this week where 15 armed guys landed on the beach in front of a resort and started shooting and hunting down a couple of rivals and killed them. Talk about a black-eye for Mexican tourism. Fortunately, no gringos caught lead poisoning.
Yes, violence happens everywhere. But when it happens so blatantly in a "safe" area, it does indeed raise eyebrows about whether you want to put your family in jeopardy for a nice beach vacation. And I say this as one who loves Mexico and have traveled all over it. Will I stop going because of this? No, but any thoughts I had of buying a casita and retiring there are now just a pipe dream.