Stationgirl I totally wouldn't judge what you did - given the "mood" you were in. Sorry to hear about your dog by the way. Although, if it were me and of course I was feeling chatty enough.. I would inform people of the breed, but thats not really relevant. You probably did the couple a favor in the end. I don't know anything about Maremma's but by the looks of yours it seems as though the breed could have some "high" demands, much like other breeds I suppose LOL.
I used to get stopped by people all the time about Cash, people always wanted to know what he was (either people had no clue, or they knew..never guessed), and I know that the breed is a good all around dog for any type of owner so I recommended them and bragged them up big time, and, I got my breeder some business and ran into the new Shiba owners at dog parks and they were so happy with the dog! So I felt like I did a good thing..
However with my Kelpie mix, Cash is definitely out of the spotlight now, everyone gravitates to Thumper, and I always feel the urge to correct people because the breed guesses just blow my mind - "OMG what a cute miniature pinscher!!" - WHAT!?! Then I USUALLY just say he's "australian Kelpie" becuase you can imagine how annoying it is to sit there and tell a stranger he's "australian kelpie with a bit of border collie, australian shepherd.." Anyway, people here have no Idea what a Kelpie is, most have never heard or seen one here and they are extremely rare in Alberta, most live on farms and are usually mixes with heelers or BC's, and are never seen walking down the street or at the dog park, and there are no breeders here so fortunately I don't have to worry about someone going and buying one, and I would definitely never recommend someone buying a Kelpie based on thier beautiful looks and perfect size lol - because there's a lot more to these dogs than meets the eye as I'm sure you know!! LOL. Its just funny some of the wild breed guesses Thumper gets all the time. His agility/obedience trainer didn't believe he was either Kelpie or Border collie, she initially thought doberman mix.