We had the recording but didn’t listen to it sounds worse than we can’t determine if that conversation actual took place on our vehicle.
Wow, that is an amazingly perfect description of so many things.
For another example: computer antivirus programs.
Centralized eavesdropping of all conversations in public spaces is really bad.
If you're genuinely curious about something, you should probably not presume that it's delusional.
There is also a potential difference between camera and audio surveillance. Not that I approve of either, and I acknowledge the extreme but less common abilities of camera technology (IR, microexpression, iris analysis, etc), but having one's relatively statiic shell filmed could be perceived as less personal than eavesdropping on a much more dynamic and varying aspect of self than a bad hair day. After all, when we go out in public, most healthy people don't believe they're invisible. We have much more discretion over who hears our thoughts than who sees our faces. Audio is more intrusive in this way. Standard images of our physical appearances don't quite compare to the enormity of subject material, moods, and mind that the funkiest wardrobe simply couldn't articulate.
From the perspective you present, shouldn't anyone in public be perfectly content with mind-reading, or interrogation where the former fails?
I agree that the occasional significance of some conversations does not justify the constant widespread surveillance, but it’s a bit much to say that this couldn’t possibly be useful.
Could you elaborate what would be a valid reason? From what you wrote, it sounds like someone started shooting after some kids said some things. I can see that as an argument for gun legislation, but not for installing microphones in public spaces.
You can look up the case on Wikipedia and elsewhere if you're curious:
https://en.wikipedia.org/wiki/1984_New_York_City_Subway_shoo...
Bottom line, it's really not hard to imagine that audio recording would help determine important facts of a case; this shouldn't be controversial in and of itself. The issue is the relative cost to personal liberty.