I had a different experience a couple of days before. Again while waiting for the bus.

This time it was a young, kind of scruffy-looking guy who was scrabbling for coins. I gave him a token.

A woman with an older man said, Give him one. I said, What? She said, He doesn't have the correct fare. Give him one too. You have some more.

I cocked my eyebrow at her and said, I buy them.

She said, Oh.

I didn't give him one.

Pick your battles. :)