I'm noticing a lot more service animals around too. I saw a basset hound at Disney a few years ago and it doesn't bother me unless they 1.try to take them on rides which is dangerous to the animal or the riders or 2. leave them tied up in the heat outside a ride (even worse). I understand how some animals alert their owners to pending conditions and that's great. But last time I flew there was a woman on the plane with a cat in a carrier. She said the TSA made her take the cat out to search it (??) and the cat got loose and was all over the place going bonkers until they could catch it. I was a little freaked out that somehow the cat could get loose while we were in flight and what would occur if this happened. Not that that would happen in Disney. Cat's aren't service animals. But true service animals are "on the job" and as far as I have been told they do not pay attention to anyone else when they are working. It angers me if people keep their little pets with them and just get a service animal vest on ebay. Leave them in a nice, air conditioned, monitored pet hotel. Disney's is great. I'm pretty sure the noise and crowds at Disney can't be good for pets anyway.
Currently, Disney takes great care of service dogs in the parks. There are few rides the dogs are NOT allowed on - roller coasters, Peter Pan, Soarin, etc. For those rides, there is a crate set up where the CMs are running the ride and the dog stays there when the handler rides the ride. Or they allow you to do rider switch, if someone in your party can handle the dog while you ride. So, there should never be any dogs tied up in the heat! Oh my!
I will say that anyone who takes an untrained ESA into the parks is really asking for trouble. There is so much that could spook a dog! We considered taking my guide dog in training to the parks for our trip, but we had a plan to take him to the Disney kennels for half of each day, at minimum. We were concerned getting stuck in the parks for fireworks WITH the dog and that is really rough on most dogs. This reason, and because I wasn't sure what would happen if my dog got so tired doing all of that walking that he just stopped walking, we decided to leave him at home with a sitter.
Ok and a little off topic, but about the cat thing: My brother is a TSA - yes, they DO have to inspect any animal carrier bags at security. Believe me, they hate it more than the animals! Haha My brother told me of one woman who was transporting her daughter's cat and the cat HATED the lady. The lady refused to take the cat out, at first. When she did, the cat started clawing her and launched out of her arms! My brother (who really dislikes cats) saved the day and caught it. Also, he wasn't there for this one, but they had a cat taken out of a carrier and it just started peeing everywhere. :-/ Unfortunately, they can't put the cat through X-ray, but ALL bags have to go through, so they don't have much choice!