Alternatively, maybe it's a role-playing scenario or a fan-made project. The user could be referring to a booru for All the Fallen, which might be a niche or less-known game. Since I can't find current information on such a game or project, I should consider that it might not exist or is obscure.
: Because of its high-quality niche content, many users attempt to use automated tools like gallery-dl or imgbrd-grabber to archive images locally. However, ATFBooru’s authentication layers—including Cloudflare-style verification and cookie-based sessions—frequently lead to technical hurdles like 503 or 401 errors for scrapers. allthefallenbooru
Jonah asked about it on the site. A few users replied: "maybe it's a collector's mark?" "I've seen similar tags on scanned negatives." Someone suggested it might indicate an uploader, an account consolidating finds. Someone else wrote: "Or it's a map." That message earned a flurry of confetti emojis and a maybe-joking reply: "Maps? On a booru? Sure. Why not." Alternatively, maybe it's a role-playing scenario or a
The pattern of disappearance forced people to hold the archive more lightly. They began to make offline gatherings, to copy images to their own drives, to write physical lists of favorite routes. The ritual of leaving became more considered. Offers were made: a public spreadsheet to document who had left what and where. That spreadsheet lasted a week before being abandoned because the community resisted turning the tender, accidental things into bureaucratic records. Jonah asked about it on the site