My theory is that you will never, ever hear about the intelligent and capable criminals because they're too smart to be caught. In Europe, they're rolling up an entire criminal network because someone thought this was a good idea:
A top-secret communications system used by criminals to trade drugs and guns has been "successfully penetrated", says the National Crime Agency.
The NCA worked with forces across Europe on the UK's "biggest and most significant" law enforcement operation.
Major crime figures were among over 800 Europe-wide arrests after messages on EncroChat were intercepted and decoded.
More than two tonnes of drugs, several dozen guns and £54m in suspect cash have been seized, says the NCA.
While the NCA was part of the investigation, it was initiated and led by French and Dutch police, and also involved Europol - the EU agency for law enforcement cooperation.
Wil van Gemert, deputy executive director of Europol, told a press conference in the Hague that the hacking of the network had allowed the "disruption of criminal activities including violent attacks, corruption, attempted murders and large-scale drug transports".
You only need one person to be your single point of failure.
If something similar to this is in use in America, you can well assured that the FBI won't crack it until someone compromises the network and gives up the evidence. Unless, of course, someone issues a search warrant and decides to have a look at the wireless carrier that is allowing these devices to operate.
There is no possibility of a "secret, encrypted, protected" large-scale commercial wireless communication network. No government would ever tolerate such a thing. They can advertise that they provide this to you, but companies like this are likely cutting deals with government agencies to open up their system for inspection.