If I were the band director, I'd play it anyway. He doesn't have authority over them. Why even have a marching band if they can't play the fight song?

If you want to make it all about your son, how about commissioning the band for some theme music they could play just for him or something. I wouldn't have nearly as much distrust and distaste for Sanders if he could just be integrate into a school's culture and traditions rather than parasitically replacing them with his own cult of personality.

Sounds like even Joel Klatt is souring on the Sanders experiment, so it might not be long until the whole fan base is calling for him to go (although I'm sure he's planning on leaving after this season anyway)