I won't go into great lengths about what kind of things he did to other people because I don't know (and I didn't ask him). One thing I do know is that he has such strong self-confidence and -esteem (or like the Chinese slang "thick face" -- not in the sense of shamelessness) that when he was called names, he simply didn't care. I really have to give it to him.
Did those kind of things ever happen to me? Not I'm aware of. I guess I've been lucky in that regard. If it ever does happen, well, I guess I'll just think of my brother.