RavenSky
The Doctor's Wife
This is not accurate, but it is indicative of the problem. "Service animals" - as Don2 attested - are highly trained, and a lot of that training is focused on socialization. Frankly, this has nothing to do with making the animal acceptable to the general public, but rather to making sure the general public does not distract the service animal from their very important tasks.
You can somewhat compare their training to other working animals like rescue dogs and police horses. They have to have the temperament and the training to stay on task no matter what is going on around them.
The problem is that once the genuine service animals are trained, there is not an actual way of separating these from the family pet with a mail-order vest so long as those vests can be purchased by anyone without any verification whatsoever.
It depends on what they are for. The animal he's getting will be highly trained. My mother's Seeing Eye dogs were highly trained.
However, some dogs are useful without training. If the family pooch consistently reacts to an imminent seizure, presto, seizure dog--with zero training. A seizure dog is definitely useful but that doesn't mean said untrained pooch should be allowed where animals aren't allowed.
A "seizure dog" still has to be trained and socialized just like Don's dog. If it isn't, then it is not a service dog