There's no way I'd fly with my pet dog given the horror stories of those that do. At best, pets seem to get sub-par treatment, at worst, they are abused and die. I'd think pretending they're a service animal so they can fly _with_ you is better than putting them in a cage and in with the luggage, at least for the animal.
Personally, I think people that need service animals deserve that right and should be respected. So I just don't fly with my dog. No real need to, there are plenty of local boarding options, including "doggie daycare" places where he's never locked up.