In my experience, there's several people who due to poverty or lack of concern are not registered with the relatively new CURP system. Thus I wonder, how will it affect those people? Will they shell out 20 pesos to pay some kid with internet access to get it for them, or will they stop using cell phones?
I believe (and hope) this law will fail in epic proportions. Mainly due to Telcel, pretty much the only cellphone provider, losing too many costumers over it. Also, there seems to be much opposition: there are very few comments supporting the law on the article linked.
Mexico does need a way to get rid of our infamy before the eyes of the world, a police state will only make us even worse. We don't need this kind of stupidity coming from our government, however corrupt it may be.