How I see it playing out:
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.
