I think perhaps the difference in our thinking is that the GAC is designed to help CMs see invisible disabilities (such as vision impairments), not to provide special access in any way. Those methods of equal access, such as the GAC, are protected by the ADA and a person cannot be made to "prove" they are disabled every time they turn around just to get equal access to something.
So how much money should a person expect to spend on getting a GAC? Can it be from any doctor, or would it have to be from the one treating the condition? At most of my (and any I have encountered) specialists and even my GP's office, they will not write a note or fill out a form without and addition fee. At one previous neurologist, it was $25 a page.
So now you have required a person with a disability, to pay for a doctors appointment and a paperwork fee, and this is usually a person with a fixed income. How much are you going to charge people without a disability? Or are we the only ones who get penalized financially for needing equal access to the park (I mean aside from the thousands spent out of pocket each year for durable medical equipment that insurance doesn't pay.
I get that right now you are thinking of how Disney could get around the civil liberties protections written into the ADA so as to avoid the fakers, but do you see how quickly this could snow ball into a "papers please" atmosphere. I could be required to show written proof before being allowed to sit in the accessible seats in the theatre. Or when I tried to access a bus (not Disney, I mean in my daily life) and required the ramp to be lowered. Or when I state I need the accessible check out lane in the super market (as the others are often too narrow for me and my chair)
Fiddling with the ADA has implications much broader than whether you think too many people with a GAC are in your fastpass line.
Also, if you mail the paper out what is to stop me from writing the letter myself? My doctor's office will not allow forms to be mailed to them frequently (if they are from non-medical sources, such as camps, waivers, Disney, etc)
And I could easily make up a license number for stationary, and no CM in Guest Relations would ever have a clue it was fake (especially if I made up my own and did not steal one). And even if they did know, I could turn around and sue THEM for requiring one against the law.
And what do people do who have a sudden injury or a flare up of illness while on vacation. Do these people have to go to a doctor? ER fees are quite high, and many insurances have no coverage for out of state visits except the ER. So when my mom pinched a nerve in her foot, again, we should have gone to the ER, lost a whole day in the parks, to get a special doctors note (would ERs have this special paper, or do they have their own letterhead) so they can access the parks equally to those people with two working feet? Instead, my mom just went and rented a wheelchair and spoke to Guest Relations about and ADRs we might have in an inaccessible location. It was a $10 fix that took no more than an hour, rather than costing us hundreds of dollars for a note.
And I tend not to pay attention to "unwritten rules" that make the lives of people with disabilities more difficult in violation of the ADA. I much prefer to pay attention to the actual laws which took decades to build and develop, and were written by experts.
You may have seen CMs refuse to give GACs before, but this generally happen either then the person with the disability is not physically present or when the person requesting the GAC cannot verbalize their needs and explain why the standard arrangement of the park (queues, stairs, etc) will not work for them. Often these people are requesting a GAC which will keep them from having to walk and stand as much, and there is no card in the world to make the parks smaller or distances shorter.
So, no, I'm sorry but I must reject your "unwritten rule." I do not like anything that violates my civil liberties in order to make life simpler for other people. I prefer the written laws of the ADA and their enforcement.
Thanks, guess I didn't realize the extent some people might go to in order to try to get over on Disney.
As far as the people refused the GAC, you're probably right. I only overheard a part of the conversation while waiting for the CM to give my friend her son's GAC.