That was my first thought as well, but then I realized normal people aren't just waiting with stow away guns waiting for the day they can go on a killing frenzy. The type who are like that are possibly connected to drug as wells (as either addicts or part of the criminal machine) which means they are more likely to go into hiding lest they be killed themselves.

Yes, maybe some murderers will slip under the radar, but the numbers so far look good. Only 30 deaths over the country (that's no killing frenzy) and 952 people have surrendered to the authorities. I'd say it's working