Radios are hidden and unlootable in some building corner (don't know how you can do it with the mapper, but they were totally hidden on 2238) ; the aim is that everywhere in town if you walk/run you might see what is told to the radio.
the radios in town are controlled by :
- an automatic script wich tells in cycle "the town is under control of XXX team", "Wearing weapon is forbidden during martial law", "no specific law in town", etc.
- Players from the faction controlling the town for their own manual announcement
This could be private radio channel : 9999 for redding, 9998 fo BH, etc. People form the faction controlling the town can broadcast on it, other wastelanders can only listen(because not of the faction).
Automatic announces might be on short cycle, one sentence every minute or 2 minutes.
This allow wastelander to know about faction wich is in control and the rules they fixed in town.
This also allow faction controlling the town to warn about imminent attack during TC window (even without radio, because there is some almost everywhere in town).
I hope you see the idea of a restricted radio channel, i'm pretty sure facing what i saw last days in controlled town this could be a real plus.