It's homophobic seal all over again.
Language is volatile and meanings change. Which is why no one thinks about homosexuals when they call something lame "gay". It's only a matter of time until they rename the disorder into something else, because people will consider using the word even in context as "demeaning". And then people will forget even the meaning of autistic when using the "slur" and we will all move on.
THE CIIIIIRCLE OF SLUUUUUURS!
If you demand respect or gratitude for your volunteer work, you're doing volunteering wrong.