It takes real strength and maturity to risk being laughed at by your peers especially during those teenage years. I've a feeling that even though you didn't get the chance to say all those things to the boy he won't change because he acted from instinct. He knows right from wrong. And he is already changing others - I'm sure some at least would have felt a prickling of guilt watching their mate do what they know they should have done? These kind hearted souls (male and female, young and old) do make the world a better place in spite of the 'me first' brigade.