What's old is new again.
https://en.wikipedia.org/wiki/Fictitious_entry
Fictitious or fake entries are deliberately incorrect entries in reference works such as dictionaries, encyclopedias, maps, and directories, added by the editors as copyright traps to reveal subsequent plagiarism or copyright infringement. There are more specific terms for particular kinds of fictitious entry, such as Mountweazel, trap street, paper town, phantom settlement, and nihilartikel.[1]
Disregarding the obscene amount of automation at play, the underlying problem and its remedy remain somewhat the same. Put bad data into a very large dataset, such that it evades cursory scans, and the unaware plagiarists are eventually caught red-handed.
