Personally I’m a dog person to the core, but I would fully support a Federals law requiring Service Dogs to be officially certified. That should make it harder for cheaters.
Unlike many on this thread, and for the person several pages back who voiced concerns that HAL is known for lots of dogs, I’ve never seen any dogs on the sailings I’ve been on. So I really wonder just how common they are.
I do occasionally take my pooch to public places that allow pets, for socialization. We have several businesses, such as Home Depot and some restaurants where pets are welcome. I would never try to pass him off as a service dog. (However, HE does demand service, and acts like we’re his butler and/or valet.)