There have been several posts about it here in the Doghouse.
We have a reactive, elderly greyhound. We are working with a trainer using BAT which is helping enormously, but in the meantime he is wearing a yellow bandana when we go out.
Generally, the essence of BAT is that we help him keep a comfortable distance from other dogs, so it's hard to say.
However, sadly, it doesn't seem to have stopped the numpty element - had one on Thursday who was so busy talking on his mobile I think our dog could have been wearing a yellow neon bodysuit and I could have been naked but for a yellow feather in my bottom, and he wouldn't have noticed (and his huge, boisterous Malamute had zero recall
. Today, a woman in the park had her two large poodles off lead in the designated on lead area and they were racing everywhere. One of the problems is that with the numpties, either they don't pay attention (like mobile guy) or like poodle woman, they just let dogs off lead and are miles away themselves. And of course, nobody has told the dogs that they must stay clear of yellow dogs!
But it's a fairly new thing, and of course it will take time to become better known. I see references to it regularly on Facebook etc. but I move in very "doggy" circles. 