To be honest I don't see just programming everything suggested into a scanner. Even with all the MURS, all the FRS/GMRS and all the Marine, don't seem like it's over 200 channels. Any modern scanner can cover that in under 3 seconds.
I'm not aware of a back door on AES-256. The number of possible keys is number of grains of sand on the beach large and while the folks at Fort Meade probably have the computing horsepower to accomplish this, it wouldn't be in real time and more likely to take months or years to using brute force. Might take less time if the key was poorly derived or if there was intel.
The encryption professionals in MD are actively working on quantum encryption and while it may not be ready for primetime, AES-256 is openly available. Everything that is in the commercial market and approved by NIST on behalf of those people, has a backdoor installed.
The Feds don't allow computers, encryption, etc. to go outside of their closely held purview without their access.
Back on topic, citizens have been using radar detectors to avoid the Highway Patrol, cameras to surveil the police, and receivers to commit crimes - major to minor.
The government using photo-radar, anti-radar detector technology, mail covers, pen-registers, Sting Rays, and other technologies should not surprise anyone. The US of today is not the US of 1789.
To be honest I don't see just programming everything suggested into a scanner. Even with all the MURS, all the FRS/GMRS and all the Marine, don't seem like it's over 200 channels. Any modern scanner can cover that in under 3 seconds.
A smart hunter would use an encrypted simplex DMR frequency or P25 encrypted frequency with a surplus Motorola XTS radio or something like that and you wouldn't be hearing anything.
A smart hunter would use an encrypted simplex DMR frequency or P25 encrypted frequency with a surplus Motorola XTS radio or something like that and you wouldn't be hearing anything.
If it is enrypted the conversation can't be heard but like you said the location of the transmission can be tracked like if someone had a scanner with close call in the area and they got a hit but if it's DMR simplex it is harder.
Around my neck of the woods they using Marine radio's HT and mobile radios. Be glad when they catch a few and bust their wallets open. We also have a few hunt clubs (very few) with their own frequencies in VHF band. More Marine band pirates than legit op's.