As I understand it, people mostly change their mind (and thus behavior) for two reasons.

The first is in-group beliefs. If someone sees other people in their in-group believing a thing or behaving in a way, they're more likely to adopt that. Possibly the people who play audio in public, their friends and peers are the same way. But if you also might be in one of their groups, like a college kid to another college kid, or a junior professional to another, talking to them might make a difference. But if you're like a 59 year rich old white guy, telling a 16 year old non-white poorer kid is unlikely to land, because they probably see you as outgroup.

The other thing that changes minds is horrible trauma. Like, if you smashed their head into the bus window, took their phone and transferred all their money (via venmo or whatever), then tossed the phone out the window, they might change their mind about being a public irritant. Maybe. They might also take some other lesson instead. But either way you'd go to jail for several crimes, so probably don't do that.