Just like https certificate authorities, the only way to fight all the AI slop will be "trusted" camera firmware that signs every image with a full chain of trust that the output was a real physical video taken will a real device at a real location.
Or integrate GPG w something like OpenCamera. Then, every time you take a photo w your device... the photo could be signed automatically and transparently w your key.
If that existed and was used, it'd be simple to suppress Sloppy content.