Irena, if I were you, I would document the incidents and let the pricipal know that they may have to deal with your attorney for harrassment of a disabled child and I would send a copy to the school district superintendent. I know that you already have other issues that you are fighting with this school and may not want to take an extreme approach on this, but just reading this post makes me speechless - in these politically correct times, how do these people even get away with behaving this way? And your poor DS, what has he done to deserve this level of discrimination to make you all feel unwanted in this school?
No child (or adult) has to suffer through this.