I am not going to touch upon the legal aspects of this issue, but did want to chime in a few things here. As a teacher of students with autism each and every year, I think it is important to state that autism is a spectrum. Think of it as a line. Some children are on the end where they are the least affected, others are in the middle, and those on the end are severely impacted. Because of this, accommodations may be different for each child due to how they are affected by this disorder.
With that being said, I think that the combination of
DAS and FP+ is a solid - and smart - solution for many autism families. It eliminates much of the guessing and waiting times. However, this is not something that will work for everyone, and in that case, accommodations should be available. This does not necessarily mean skipping ahead of a line.
It could be an alternate waiting area for the child, entry away from the large mass of people filing into a theater attraction, not sharing a ride vehicle, and so forth.
Are there guests that could potentially abuse this system? Of course. Is it the majority? I highly doubt it. Still, I don't think we can pool all autistic children into the same arena because of their varying tolerance and ability levels.
The bottom line? Fair isn't everyone getting the same thing. Fair is getting what everyone needs in order to be successful.