The very limited range of FM part 15 makes it practically useless for reaching out to a neighborhood, but there are indoor uses for micro-FM transmitters.
Two uses, for example, are sending an FM signal 35-feet room-to-room out to an SSTran AMT5000 for re-transmission on the AM band which does reach into the hood.
2nd use is sending FM 6-feet over to a radio for editing audio.
The big bug-a-boo is multipath, those unwanted signal fade-outs in with blasting noise-static pops blowing voice-coils.
You think you've got it fixed for a week and suddenly it's back, proving conclusively that there are evil entities intent on wrecking our peace.