He was drunk only once?
- This is his edit on the wiki page of Missouri from the day of this tweet: https://en.wikipedia.org/w/index.php?title=Missouri&oldid=693016799
- He replaced an svg with png, so he didn't even know how to properly fake a map
- His username was Robwhisman, he had only one edit on wikipedia, when he replaced the map. https://en.wikipedia.org/wiki/Special:Contributions/Robwhisman
- I suspect he was not found via this tweet, but his account was a fresh registration with only a single edit, most suspicious. Amateur vandal. Professionals lurk with small changes for years, than slowly ramp up to bigger levels, like the teenager who faked an entire language on wikipedia for years, and noone noticed his edits are just gibberish: https://www.theregister.com/2020/08/26/scots_wikipedia_fake/ He was caught after 10000 articles, not after a single edit.