[gravypod]

Listening is 100% fine in the USA. Transmission without a ham license, and in certain bands, will net you some fines and maybe jail time.

[vitovito]

Any spectrum recordings would almost be guaranteed to include copyrighted content, and in the US distributing those recordings would fall afoul of the DMCA.

[gravypod]

That's not how RF works. The courts have heard cases like this. Look up the talk on CreepyDOL from defcon.