It's a tuff one.. but the first ball was dropped by the parents.
"Daddy, the bus driver was a salamander, he cursed at me!"
My dad woulda absolutely wigged out at that crap, his answer woulda been "So what did YOU do to get him mad at you?. How many times have I told you to shut up, sit down, pay attention and do what you are told at school or on the bus?"
And he woulda followed up with the school, and I woulda been in deep watermelon if the story didn't check out. But that's 1960 America.. not 2005 America. In 1960 America, the teacher or bus driver woulda sent me to the principal, the principal would call home & discuss it with my parnents and then I woulda gotten a swat with a great big oak 'paddle' that woulda made my backside smart for a coupla days. Then when I got home, I woulda been grounded and had to sit in my room till Dad got home and THEN gotten another beatin with a belt.
Net result, when a teacher or authority figure said 'shut up, sit down and face forward', I woulda. I didn't have to worry about the bus driver smackin the crap outta me.. the principal and my Dad had that job.
Nowdays, the parents simply side with the kid, the kid learns to lie and twist the truth and parents just assume the school is staffed by incompetents. (in this situation, that's the case; that bus driver was outta line)
Short answer.. childerns attitudes towards adults and authority figures are shaped in the home, AND at school. By the time I was 10 I certainly understood that mouthing off had a severe penalty.. why haven't these kids learned that? Cause mommy and daddy dropped the ball; at home first, and with the school second. Mommy and Daddy elect the school board, the school board is responsible for making sure the school deals with our kids in a way that's appropriate and rational.
The systems busted, and the breakdown starts in the home.