Radio is an ingame feature, not an outside IRC channel. I think it would be awesome if NPCs dropped radios set in random frequencies. Why? because it gives you the chance of catching other players' conversation, and spy on them. It would take Radio closer to what it seems to be supposed to be.
I know IRC fucked FOnline radio, but people still use them, even if it is just to meet by distress signal. There would be a chance of getting an unexpected visit when you send a signal to your pal. Of course this wouldn't be happening so often, but the possibility would be there.
Also, I don't know why all NPCs' radios are set on channel 0... maybe they laugh at our trolls.