1. Individual journalists do not sign up for this, publications would, as an integration for every article.

2. A casual reader from Fergus falls would notice a few weird things, and start raising questions.

3. That would start the snowball into all the other things the 'fake journalist' would be doing, at least for the article. Once you get popular enough, the internet haters will follow through, since anyone with something of a following starts attracting internet haters into their life eventually.

This will have all the general problems all internet comment sections do currently although, like twitter.

Actually, it's interesting how little attention internet haters paid to Relotius, considering he was writing on polarising subjects, winning awards and he was arrogant enough to throw in details that were trivially proven wrong like election results as well as random deniable lies about the individuals he interviewed or said he interviewed. Perhaps writing in German and on things happening overseas helped shield him. But yeah, agree that internet haters are the way forward for crowdsourced factchecking (at least on subjects a bit less partisan than politics or sport where the haters can generally be relied on to reach some sort of consensus)