Passenger with disability refused boarding of accessible bus

If I could believe incidents like this where a mother and her child with a disability were refused boarding to an accessible bus were really about miscommunication or even bad training it would be one thing. Call me a cynic, but I believe that when something like this happens it is more often than not a product of the refuser not wanting to be inconvenienced. Who, besides the folks involved in this incident, should be outraged by this? How about the taxpayers that purchased a bus with accessibility features that aren't being used. (Photo by Kenn Kiser via morgueFile.com)