it is much more nuanced than your 'stealing' analogy. nobody is on 87.7 or 87.9 in the city. is the 'big bang' stealing from non-existing users when it spews background noise on these frequency 24/7? should we sue the universe? there is the issue of stealing ads money from those who 'play by the rules'. but that set of rules does not even allow other players to enter the game due to compliance overhead and an artificial lack of frequencies due to 1st/2nd-adjacent rules. i finda such a scheme indefensible for its exclusionary nature, and it is intrinsically bound with technological progress
ten dollar CVS/Walgreens MP3-players can easily seperate WBRU95.5/PVD vs WHRB/95.3/BOS, ZBC90.3Newton/Energy90.1Brockton. so can my German radios from the 70s with machine-wound inductor coils instead of IF-DSP. i'd be interesting in hearing from anyone using a crappy off-brand walkman from the early 80s. management rules have resulted in licensed business users with extremely low (sub-1%) duty cycles on a vast swath of frequencies leaving "impossible to cheaply enter" slices like the 1800/900 Cell bands and 88-108, while other chunks site almost entirely empty, like all of 30-88 mhz. the FCC's mission of "To promote robust competition and innovation in the telecommunications marketplace " (yes, right off their website) is clearly 'newspeak' since regulation is the antithesis of competition. meanwhile SDR has migrated to the 'in everyone's pocket' level in the meantime, and a DDS and ADC don't care where theyre operating and are happy to do 0-3.3 GHz without a sweat, they can seperate signals down to the milliHz level if needed, and can implement complicated sprectrum-hopping schemes when needed
FM may go out with a whimper like the AM band. just about everyone has cellphones, wireless ISPs can enable multicast on USTream/Livestream stuff and be done with it. even Pandora has a single-letter NYSE ticker symbol now(!)