She definitely is DU-grade. Her key words, if I understood some of her screeching were, "I don't care!" and, "It's nasty to ME!"
I have a problem with female and male (usually the former, that I've seen) who use the magic words "service dog" to take their purse dog with them wherever they damn well please. They trivialize real service dogs and the handicaps for which they have been trained to aid.
The man she was hating on through his dog has a real handicap, acquired through serving our country, and his dog is a true trained service dog (besides the vest, the dog is not even responding to her screeching, which is how service dogs are trained). I have zero problems with people like him and their service dogs coming into a restaurant or store or church or ... where I happen to be.