Earlier quoted context omitted.
Talking to strangers is a skill. You can practice it! I've made a point of trying to practice, albeit halfheartedly, and even though it's difficult for me, because I like it when other people try to talk to me . Earbuds stop this practice dead in its tracks. You can't deny that.
I just pretend I haven't noticed they have earbuds in and start talking to them. Virtually everyone seems happy to have an interaction, I get the feeling people are a bit starved for random friendly contact.
If a stranger bothers me while I have my headphones on I may act friendly and polite, but I am actually very irritated.