Fist off. I work as a bus aid. I'm the guy who's paid to yell at kids for being morons. Since I can't say what I'd love to say while on the job, I'll say it here:
Remain seated. Keep the voices down. You don't have to shut up, but we need to hear in order to drive safely. Play your DS games or listen to your iPod so that you're not acting like an ass and distracting the driver. We are drivers, not babysitters, councilors, referees, nurses, or protection from Bobby the bully.
It's not difficult to comprehend rules are there for your safety. And it saddens me to see kids think they're cool by using the bus as a jungle gym while in motion, not remaining seated properly, dangling out the aisles/windows, littering, and showing a complete lack of respect for someone who takes time out of his personal life to make sure you kids get to school without being kidnapped/raped/beaten up/harassed. I don't care if you do that to your parents, but give us people a break.