Okay, there have been quite a few criticisms for Autistics Speaking Day. I would like to be blunt and address these:
1) this event is about autism awareness. Yes, it is a response to the Communication Shutdown, and counters it, but the ultimate goal is Autism awareness by providing autistic people a united opportunity to share experiences. By whatever method of communication possible.
2) there is no donation goal. Yes, people have suggested alternative organizations and things to donate instead of Communication Shutdown, but that is individual. On a whole, the purpose is about raising awareness.
3) Just because someone is doing something with good intentions doesn't make our feelings invalid. We don't like Communication Shutdown for reasons stated in the information. As autistic persons, we are completely justified in having an opinion on what's being said about us, and have a right to be involved in all matters that relate to us.
Thus, if we are upset by something, we have the right to do something about it.
4) we have never stated there is a limit on ability level for participants. It's rather presumptuous to assume that everyone taking part is of the same "ability" level.