Regardless of what Mr Webster says (Score 1)

A publication is a publication is a publication. Just because the source of a publication is something that is generally regarded as private (like a diary or journal) that doesn't afford a publication of that work special rights or considerations. If I write a journal filled with unfounded accusations and keep it to myself, nothing is going to happen. No jackbooted thought police thugs are going to break down my door despite what many on ./ would have you beleive. But if I publish that journal in book form, in a magazine or newspaper or on the web, I better make sure I can defend the content against slader or liable charges.