Interesting post, thanks for sharing!
I agree with you that the spectrum is vast, and it's unfortunate. My mom is a pre-K teacher, and many kids come in and don't get tested when they should. Each year, out of about 40 students, she will have 5 or so on the spectrum. Her program is considered at risk.
I think what people don't get is that the spectrum swings from a very mild case of Aspergers to very low functioning autism (and everything in between, this was just a cornerstone). And while most people work very hard to ensure their children lead normal lives and deal properly with the diagnosis, there are some that simply don't care.
My mom's school is considered to bring in quite a few low income kids. It is often these kids who are on the spectrum (some very obviously even if undiagnosed), that have parents who would be more than willing to seek accomodations beyond their needs. Even some of the parents from the higher income areas over compensate, rather than let their child grow and develop.
For example, one student last year had mild Asperger's, and was in therapy several times a week. The therapist often noticed her obsessions and ticks, but outside of that she functioned well. At picnics and parties, little Suzy would have to bring special food, sit alone, have a specific craft, etc. On a normal day in school, Suzy would eat snack with the other students, participate well in the same crafts, and be a part of the group. The parents failed to recognize that Suzy could function well in groups, and I can easily see them being the type to want front of the line accomodations for all rides, just because Suzy had Asperger's and therefore could potentially have an obsession or meltdown. More than likely, she would react similar to class outings - fixate, but be okay with taking turns and the like.
So while I agree with your point that autism is a vast spectrum and we shouldn't be judging anyone with it, and I certainly am not judging, I also agree with those that feel the newer GAC accomodations are more fair. But, it's hard to be in Disney's shoes. How do you, having no work with the child determine what they cannot do? You can't, so you must generalize. If a parent came to me as a GR CM in this scenario, with something stating their child has autism of any form on the spectrum, I have to take their word for it, regardless of whether or not they intend to abuse the system. It's unfair to expect some doctor to write a three-page letter on what Johnny can and cannot do, a CM to read it, and then according to some code of spectrum determine the aid needed.