I expect he's going to say he didn't mean that he fabricated the story, but instead meant that he "created the story" in the sense of bringing it to the media's attention
I think the objection here is that it creates a massive loophole: Intentionally post misinformation, claim you thought it was legitimate. Repeat until you stop getting the benefit of the doubt, start over with a new account, repeat ad infinitum.
I'm not sure what the best solution is, but I think we at least need some kind of very clear notice, on the feed page and not just in the comments, that the content is proven to be factually incorrect.
I certainly see your point. That said, devil's advocate, the comment doesn't refer merely to political opponents, but rather:
the most evil people I can think of
Can you honestly say that you wouldn't painlessly snap, let's say, a proven serial child rapist out of existence? I think I'd do it, if for some reason the justice system was unable to stop them.
What about french press?