The law does not define "proper". Neither should Disney. Intolerance is a small demographic in the USA but the voices of intolerance are loud. We are as nation are slow to the party from marriage to pets. I am continually amazed by how we get ourselves in a knot by the smallest of issues. A gay couple, nor a dog has zero impact on my Disney vacation. I don't grasp the need to zero in on irrelevant things. We are in a strange place right now in our nation with who should have health insurance, who should be in our military, what is proper, what is not by judgmental standards. Intolerance is rampant by a small but loud demographic and an equally small demographic that what wants to define what is proper and improper by their singular attitudes. Then again I was born in an era where my folks had to search for an apartment that would accept Lord forbid 'children' and people of 'color' oh my! So it doesn't surprise me that many freak out over a dog. I am baffled by those who waste their time wanting to define for others what is proper and improper.
There are bomb sniffing dogs at airports and all sorts of places including WDW. Ultimately guests survive So a non issue. I was at the Wilderness Lodge during Irma. Many a pet took refuge at the Lodge during the hurricane. It went well. It is now mandated by law so owners do not have to abandon pets in emergency situations. I have never traveled with my pets but I have yet to see witness any horrid situations either. Thoughts if pets in hotels was an issue it wouldn't be a growing acceptance. Our military utilizes dogs, our police do. Still some freak out.