I think that most people, generally have an idea of how to "treat" persons of disability. Most oftenl, I find people are judgemental because they dono't know, hence, comes the mistreatment. Our institution and especially the course I instruct, has a class devoted especially to SPecial Populations. Before the student even gets a chance to have a second opinion, they are provided with the tools to "level the playing field". Knowledge is invaluable.