oh my god thats horrible!!!
I have taken the school bus with children like that & the bus driver just ignored them, unless one went a little crazy, then the driver would stop & calm the child down & continue driving. I've grown up with mentally challenged people & I have never once seen anyone get angry at one. My dad works at RRC (a permant hospital for mentaly challenged people).. The worst I've seen is that u have to talk/yell (not crazy yelling) fermly to some of them, thats the only way they understand & they usually go away to stop pooking at me.