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Why has the letter writer committed her life to writing--and what kind of writing? Technical manuals, ad copy, advice columns, erotica, scripts for sitcoms? There's lots of different avenues and genres, and sustaining a career in some wouldn't be particularly difficult. But the letter writer hides her real agenda--she wants to be recognized as a "writer". The recognition, not the action, is what matters to her.
So, get a t-shirt or a tractor hat made that proclaims you're a writer. After all, Salon published you.