that is how it should be!
Well, I dunno... that's asking quite a lot of strangers, when it was your daughter's own fault. It's nice if it happens but "should be" is putting it a bit strong. And EvianBaby should be topping up her card rather than relying on other passengers to pay her fare too (because that's what's happening if the driver doesn't collect from her). I hope they let you off outside the debtors' prison, EB!
But in the case linked to, yes, I would have helped the girl.