The lady claimed to have "back" and "knee" problems, which got her a GAC, but apparently, those same "back" and "knee" problems don't interfere with her business of showing people around the parks as a tour guide. I'm sorry..I could be really callous, and really cynical, but THAT particular woman is entitled to NO accomodation whatsoever IMO. If you can operate as a tour guide (and note, she wasn't even using a scooter!), then you can do the park as a regular tourist.
Same with the other guy...who apparently was spry enough to use stairs and also walk around the park. Perhaps he has some "hidden" disability...like autism, etc which makes it hard for him to be in crowds or wait in line. Again, though, it seems a strange profession to have...to be a tour guide in a crowded amusement park if you are bothered by crowds. I call BS on him too.
I do think it is too simple to get a GAC, honestly. For those that need them, they are a blessing. But, now, people make this crap up so they can get this sort of stuff. I would think the disabled community would be more incensed than anyone else about this. It is putting the whole program at stake for the selfish wants of a few.