In summer I often leave the car radio tuned to 87.6 FM in case of any Sporadic E appearances from NZ, or for distant Tropo Aussies. I sometimes hear hands free systems / satnav guides / playlists etc from cars closeby. I also hear people's phone conversations ! I wonder if they QSL ??

But then again some drivers have their hands-free speakers turned way up, and shout into them, so I hear these conversations at the traffic lights anyway.
Amazingly on the Daegu GT SDR which sadly now appears offline, the only local thing you heard on 87.6 was Korean satnav instructions, or the large up & down fading open carriers from them as cars with these things drove past.
I remain an analogue (or twin-paired copper wire) kind of guy.