For people not in the writing and publishing world, this may sound like an obscure and technical issue, but for me it is one of honor and integrity. This writer is a douchebag for misrepresenting his work as new, and he has made me look like a douche for publishing it as new. I have uncovered numerous instances of this kind of chicanery involving this writer and a number of other zines. I have informed the affected editors so that they can decide for themselves whether to do as I am doing and ban from consideration any future submissions from this person. I am sure there are many other publishers whom I have not yet informed because I am sure that I have not uncovered every instance of this situation. If this were some newbie writer who didn't know what he was doing, and had only done it once or twice, I could maybe forgive and forget. But this is a person with literally hundreds of credits (many of them evidently duplicative under false pretenses).
Despite my rage over this and my natural impulse to call out liars when I spot them, I think I have made the correct decision by not yelling this person's name far and wide and instead just dealing with it directly with the affected parties as I discover them. Word spreads among the zine publishing community. My research into this fraud happened to lead me to a blog that is evidently almost wholly devoted to hating this writer, and does so with great bile and personal nastiness. That sort of thing is not my bag, and I will not participate in it. But I will make sure to take any opportunity that presents itself to shut down yet another market for this particular writer. I have already closed about ten of them.