To be fair, unless it's sockpuppet accounts the author only posted it twice (potentially in error, the second one got flagged). Can't really stop other people from resubmitting your Show HN.
Ok, maybe I overreacted, but it is because I saw the other two submissions, coincidentally, then I thought it was maybe submitted more (perhaps because it was flagged at the first time I saw it).
I've seen other cases of overposting in the recent past, so I became suspicious of everything.
