So the bus driver should have to put up with a noisy, misbehaving child? While he's trying to drive a bus? Which is full of people? He doesn't have the right to an opinion?
I specifically remember all of us folks on the primary school bus getting a lecturing to after some misbehaviour (nothing serious, just some mucking around, getting out of seats, making noise, and throwing food. Not on a large scale, but I guess months of that behaviour sort of builds up)
Our bus driver explained to us that he's constantly distracted by such behaviour, and can't focus on driving the bus because he's looking in the rear-view mirror at us. He explained that he wanted better behaviour, because he didn't want to have an accident, especially since a bus full of childrens' lives were in his hands.
Everyone was better behaved after that.
Likewise, I'm sympathetic to a bus driver who is continually being bugged by a constantly misbehaving child. If you're not allowed to bring a noisy trouble-making dog on the bus, I don't see why a noisy, trouble making child should get special privileges. Ooooohh, yeah, I compared a misbehaving child to a dog. *Boo hiss* But to be honest, I find a screeching child more repugnant than a yipping dog.