Oh please! Are you really saying that it is completely ok with you if I say ANYTHING I want to your children?
"ANYTHING" you want to my children? That is a ridiculous straw man you attacked. As for the real AndyTheBear, none of my comments to this thread have implied any such thing, so don't infer it.
To summarize the view I have expressed on this: Being friendly and educational as Ms Mayors appears to have done is fine. Even if there are some unreasonable people who object, even if some of them are parents.
Suppose that some parents were racist and wanted their kids to believe that black people were inferior. Moreover the schools had been promoting this notion. Should you then be very careful not to say anything, even simple factual things, that might contradict this notion? My answer is that a bus drivers like all other human beings, have an intrinsic right granted by God to interact in a reasonable manner with those around them. Moreover, I hold this truth to be self evident.