Reiterate it as much as you like, even if its not part of your job title. And feel free to be helpful to people, and even friendly.
Take a deep breath...let your emotions calm a little...now meditate...and now I shall try to explain what you have seemed unwilling to comprehend yet again:
It is OK to do good things when driving a bus. It is not OK to do bad things when driving a bus. Some of the good things bus drivers do when driving a bus (hold on to your hat) are not necessarily related to the driving of the bus (oh my gosh, how radical--but its not their job--but its not their job--oh my gosh, AAAAHHH--calmly now, calmly now).
Another lighting bolt revelation for you: not all the good things people do are required by their job description (oh my, now don't hyperventalate--calmly now, calmly now).
And now, something a little advanced, we are going to put it together (don't be scared now...just calmly concentrate): If you accept the bus driver was doing a good thing (educating) and not a bad thing (indoctrinating), and you accept that her responsibilities as a bus driver were being fulfilled, then you should conclude what she was doing was ok.
Now don't blame me if I am a little, (a lot (no a whole heck of a lot)) patronizing. Its just part of my job, and sense it isn't part of yours, you don't get to be patronizing back (though firing you would be a little harsh).
That is correct. And if it is against policy for bus drivers to 'teach' the riders of their buses, then it would be a bad thing to do so.
You would expect employees to adhere to policy, would you not?
"Now don't blame me if I am a little, (a lot (no a whole heck of a lot)) patronizing."
Oh, I understand. People generally revert to being patronizing when they have no real basis to their argument.