a) Don't set the name.
b) Trigger advertising when you type in a specific pin.
c) Use a custom radio protocol (much easier than you'd think - you could even use a pre-written one like Nordic's Gazell).
I'll be here to read it when it happens.
Besides, why should they care? That area of Mexico is incredibly violent; nobody would dare fuck with the cartels' money because they kill for far less than that. Krebs had better watch his back on this one; the cartels have a long history of murdering journalists who expose their activities.
It's only quiet because both the cartels and the government have a vested interest in keeping the violence out of the media (they have intimidated and killed journalists to keep them from reporting on cartel violence in the area). But make no mistake, the cartels own the area and I wouldn't go sticking my nose in anything illegal, even as a reporter. The police are more likely to work for the cartels than they are the government.