got my account on b in 1981.
It was the first time I had had to choose a login, but at least I was cogent enough not to pick something dorky like my name. I picked "nestpas" which, with proper punctuation, means "is it not" in French, an idiom sort of like"...no?" or "....right?"
I meant it like "I am, am I not?" but never discussed it with anyone.