Could it be that old technology would fly under the radar. No traceable emails or cell phones use.
Could be, but like I said lousy choice because it can be easily intercepted. Significant investment of time, money and energy if one wants to broadcast overseas. If you get on the FCC’s radar for misuse they will eventually find you.
Even antiquaited code is software decoded now
It's possible. And they wouldn't be the first spies to use amateur radio frequencies.
And that old technology is now surprisingly high tech depending on the mode used etc. Amateur radio operators now can access remote transmitting antennas located in much more optimum locations. And Ham has gone digital etc...You're probably aware of all this but if not, fyi.