Fable
The rule in the library that cannot just hang on the wall
After the town library opened a copying machine, readers could quickly duplicate ledgers, letters, and manuscripts. At first everyone only found it convenient. Soon, some copied neighbors' private letters, some used the machine to forge recommendation letters, and some took unpublished contracts to train writing assistants.
The curator first posted "Please use reasonably" on the wall. That statement was too soft: those who copied incorrectly said they did not know, and those who did it intentionally said they understood it differently. He then locked up all sensitive books. As a result, normal research also stopped, and the librarians were busy opening and closing locks every day, yet still could not stop content from being photographed and taken away.
The new librarian wrote an explicit rulebook: which uses are permitted, which require approval, which are prohibited; different readers, materials and outputs have different boundaries. The rules weren't just hung on the wall. The copying machine asks the purpose before duplicating, sensitive materials trigger approval, prohibited uses are blocked outright, and exceptions must leave a reason on record.
Later, someone wanted to mass-copy medical records for marketing, and the system refused and logged it. When a researcher applied for de-identified statistics, it was approved after review. The library could finally let good uses continue, put a threshold in front of bad uses, and subject gray areas to review.
The most troublesome case was a gentleman who said he was researching folklore but actually bulk-copied villagers' medical records for business. The "fair use" sign on the wall could not stop him, and the librarian had no clear basis to refuse.
The curator first posted a sign saying "Do no evil." Readers nodded, but the problems continued: some said they were only studying handwriting, some said forging recommendation letters was a joke, and some copied contracts and then claimed they did not know the consequences. Goodwill slogans cannot stop concrete abuse.
The library later layered uses: ordinary materials could be self-copied, private letters required the person's authorization, undisclosed contracts could only be viewed in the library, and forged, harassing, or stolen materials were all suspended and logged. Administrators no longer argued about what each reader was thinking; they only looked at whether this use crossed the prescribed boundary.
The director said: usage rules must be written clearly and embedded into tools; otherwise they are merely defense material after an incident.