Oh, come on. There's not a middle-schooler alive who hasn't seen the middle finger. Many of them indiscriminately drop that word in every-day conversation.
There is also not a middle schooler alive that hasn't heard the f word, but does that make it right for a bus drive to incorporate that into their language around children on their bus. I'm sorry, but that's a very weak argument.
Jude, you need to get a job in the real world. Middle schoolers may all cuss like drunken sailors, but employees of the school district are expect to show a modicrum of decorum. If one of my children's middle school teachers were to throw an F-Bomb during one of their classes, I would demand their head. School teachers and school bus drivers and school employees are expected to show some discipline in their language and expressions. If they cannot control themselves, they have no business teaching children.
Try dropping an F-Bomb or flipping off someone in Court someday and you may find that the price of speech is not free, but could be costly. As an attorney you will be required to temper your speech and your manners in court and if you don't then you may well be spending some time behind grey bars or worse, you may actually lose your license to practice law.
As an attorney you are an officer of the court and your manner in court is a reflection upon the court itself. Likewise, this bus driver is an agent of the school district. She was driving a school bus with the name of the district on it. She is expected to be a courteous and disciplined agent for the school district and if she cannot control her emotions or her language, then she has no business driving one of those six wheeled yellow vehicles.
Not a parent, huh?