I remember at my graduation (yes, I graduated college, you fuckers) the Dean, or whoever he was, asked nicely for the all families in attendance to STFU when their kid's name was announced, and to save all applause until after the ceremony.
Naturally, plenty o' dipshits in attendance had to cause a scene when their precious darling walked onto the stage to get their diploma. Several more times the Dean repeated the request, and more and more assholes ignored him, making the ceremony unbearable. The faculty was visibly getting pissed off on stage, but that didn't stop some in the crowd from acting like assholes.
If this kid can't follow directions and decides to bow and blow a kiss to his mommy, other kids are going to see that and try even more stupid bullshit to make the ceremony becomes a circus. If he can't follow simple instructions, fuck him. Welcome to the real world.