I always assumed this was happening to an extent already, particularly with sports. In the sports news world you get all sorts of "season previews" and various articles with "each team's strength's and weaknesses".

If you weren't a fan of big name teams you'd inevitably find with your team: coaches mentioned who weren't there anymore, players who weren't there anymore, and various outdated factoids / concerns thrown in. Some "concerns" almost felt like an AI trained on fan forums where issues fans had, but had no place in reality were raised, with even local fan forum lingo tossed in ...

If it was a person, or a script that generated content that got doctored by a person I don't know, but the patter was very clear.