Sim
WSJ’s report also contains a few interesting accounts of how recent and upcoming movies were kept under wraps. Each copy of each script for The Hunger Games adaptations has a few slightly different words, so that if it reaches the public the studio will be able to figure out exactly where the leak came from.
Ele é chamado de Armadilha Canária [ Link da Wikipédia ] e tem sido usado há alguns anos
A canary trap is a method for exposing an information leak by giving different versions of a sensitive document to each of several suspects and seeing which version gets leaked. Special attention is paid to the quality of the prose of the unique language, in the hopes that the suspect will repeat it verbatim in the leak, thereby identifying the version of the document.
Como exemplo ...
...before drafts of the screenplay for Star Trek III: The Search for Spock were circulated, Bennett arranged for each individual copy to have subtle clues distinguishing it from the others. Shortly after Roddenberry opposed the destruction of the Enterprise at the climax of that film, fans began to complain to Paramount and Bennett. He found that a leaked copy of the script was the one given to Roddenberry, but was unable to do anything about it.1
De um link de comentário por @Thunderforge (obrigado):
Eles às vezes são usados na televisão. J. Michael Straczynski usou-os para um episódio chave do Babylon 5 em 1993 para impedir que spoilers saiam.
This episode is going to be highly classified; we're going to limit distribution of scripts, and parts of scripts, put canary traps in all of the scripts that are distributed, and otherwise keep this one quiet. All I can say is that we're going to kick over every table we've got. In any season finale, there are maybe 4-5 things you know when you sit down to watch the show that they'll NEVER ever do. So we're doing all of them. If this one doesn't keep you glued to your seats, you've lost your chair.