It /could/ be done, but you'd have to reverse engineer the radio as it is technically preprogrammed before a unit gets it and they shouldn't icly be able to change it.
The way I've always thought of it as is a frequency update is done while the unit is off duty. But meh. It should be harder than getting a recruit and forcing it out of them. The only ones who would icly know would be high up in the command structure.Radio's I've used in real life have always been programmed, and they had various channels programmed to certain frequencies.
- The frequency is highly encrypted and is near impossible to crack without tech a civilian would nearly never be able to get.- The only real way to get onto the frequency would be to take a radio from a captive CP. They cannot be dead as when a biosignal is lost, GRID made the radio wipe so it couldn't be taken.- IF you were able to take a unit captive and get his/her radio. It would not be long until the frequency was changed as a unit was unaccounted for and was deemed MIA. Protocols state that with any unexplained MIA, the frequency would be changed as a security measure.Basically, GRID & The Union have designed radio's to be near impossible to get, crack and use. A normal civie wouldn't be able to get one but if an auth app was made somehow explaining how the civilian attained the required hacking and decryption equipment.EDIT: Also, ALL units have their radio's now ICly built into their helmet/faceplate. It is no longer a case of taking an object, rather taking an entire headset from a unit that without careful RP, you would set off trackers, alarms and biosignal losses as units shouldn't remove their mask/headset outside the Nexus.
The only group that has the potential to do this is Third Eye, at the current moment.