I've filled a few deer tags in the 36 units, which are in the Altar Valley corridor. There's definitely a lot more stuff, from violence to trash on the ground, in those units per my experience than over near the low 30s units closer to Douglas. IIRC Douglas' sister city, Agua Prieta, is controlled by a powerful, well-connected family that seems to keep a tighter lid on the violence. I guess if you want to smuggle there you just pay your fee, but if Zetas or other pin heads roll into town to start some static then the military gets called and the whole town will get locked down.