I agree with the majority of what you have said, and yes, it is completely unacceptable. But the issue really isn't sexual harrassment, because there has been no sexual innuendo. However, it is clearly a case of discrimination based on disability, and that is just as illegal.
Go the the superiors. State your claim plainly, and what you would like to see happen to correct the situation. If it isn't corrected, consult a civil rights attorney.
