The only reason anyone thinks Scout is a name is because of the character Scout Finch. Everyone seems to forget that Scout was not her name, her name was Jean Louise, and Scout was only a nickname. And it was a nn in the same vein as Champ, Sport, Buster or Boomer; a sort of placeholder, super-boyish/tomboyish form of address that isn't appropriate outsie the home or on a child of school age or above.
To me it's a silly, self-consciously butch name best suited to a hunting or working dog.
Before you criticize a man, walk a mile in his shoes. That way, when you criticize him, you're a mile away and you have his shoes!
Steve Martin