I've known people who say "Users", probably partially because "user" is already a word, but I find it confusing. I tend to say "Statian" or "Stater" as in "someone from the States".
Of those two I think I prefer Statian, but it still sounds sort of clumsy to me, though better than USAian.
The end of what Son? The story? There is no end. There's just the point where the storytellers stop talking.