Unwanted Attention?

While waiting for the 24 Divisadero, the bus going the opposite direction stops across the street. A man on board stands up, opens the window and shouts out: "TITO!!" to a man next to us listening to music. The man next to us does not flinch or notice this. So again, the man yells "Hey, Tito! Tito!" from across the street. We cannot tell if this so called "Tito" really doesn't see or notice this other man or if he does, and is purposely ignoring the other man because either he is not named Tito and the man is confused, or because he just doesn't want to talk. This continues for a good five minutes and the man on the opposite side continues to yell out Tito's name... We are conflicted whether to tell this "Tito" that someone is calling out to him in case he is just oblivious but we decide not to in case he does know him and is purposely ignoring him. None the less, the other bus drives away and the man on the bus is laughing, embarressed by the fact that he was not acknowledged.