Is this something HN can fix?
When I vote something up (as I did with the article mentioned), I'm thinking "this seems interesting", not "this seems authoritative and well sourced". The idea that someone might go through the effort of writing something like this as a "prank" didn't even enter my mind. Perhaps it might help for there to be some short-circuit mechanism for publicly flagging false stories which are found to be blatantly fabricated (or is it a rare enough occurrence that it doesn't matter)?