I think that's a great solution. I also wonder if there should be a parameter on the size of support animals, such as the size limitations of bringing your pets on a flights; dogs would have to be limited in size in the same manner, that they fit in a carrier under the seat in front of you; of course, support animals would be allowed to be in that person's lap, but then you avoid a large dog trying to fit in a space that is too small for the animal. I also read an article where someone suggested requiring support animals be muzzled. There are ways around it. As I said, I do know people who just want to bring their dogs everywhere with them and get the certification so they can. I find that level of entitlement so disrespectful to those who have true needs.
Correct on that last sentence. My sister in law got her dog certified, even though she doesn't need it, so that her landlord couldn't evict her from her pet free building.
She's always been an entitled brat, and even laughs and brags about it at family functions.
I tried to gently question her on what you bring up in your post, "do you feel that is disrespectful and counterproductive towards those that legitimately need support animals?"
Her response was every excuse in the book. "My landlord is a jerk, so who cares... My dog is well behaved, so there is no harm... It's too much of a burden to move... etc,etc.