In four and one-half years of publishing this wine blog, I've managed to only ban 8 people from ever commenting again. Today I banned that 8th person. It struck me, as I clicked the "ban" button, that perhaps I ought to explain the policy that leads to being banned from commenting at FERMENTATION: The Daily Wine Blog. There is no policy. I'm capricious when it comes to this aspect of publishing my blog. But, I can explain what is likely…