“I’ve served in the military, and was trained in the care and feeding of classified material. Were you?”
Yes, for 30 years with Top Secret TK/SI. Only counter intelligence investigators ever use planted false or real classified information to try and catch a leaker or mole. It is highly risky, managed extremely carefully, and very rare. It is only done when a one or a few people are suspected and they want to narrow down the candidates. It is NEVER done in the absence of an investigation. The idea of creating a series of documents with misspellings in order to flush out non-existent leakers is patently absurd since it would be so complex and hard to manage it would never lead anywhere. Furthermore, this technique would quickly become known to everyone handling the documents that it would become useless. There are far easier ways to protect classified information, including the need to know, and signed bigot lists.
Of course there are, the "Eyes Only" reading room being the best of them.
Still, you miss the point that most documents are not proofed and corrected. Officers and gentlemen do not hover over spelling and grammar mistakes when the important matter is the information being disseminated.
Given your background, I'd hazard a guess that you are here for counterintelligence purposes. ;-D
Honestly, back in the days of the manual typewriter, document beauty, spelling, and grammar issues were just not important unless the document was to published at a printing facility for general distribution or sent to a Conressman or the President. (Like Field Manuals, Training Circulars, and other formal material.) If you actually served in the indicated capacity for that long, you would have to admit that this was true. Furthermore, I am an engineer and work with engineers. We can't spell or compose a sentence that reflects favorably upon our level of education. The fellows who prepared those reports were not literary giants. In order to limit exposure of the material, additional personnel such as proofreaders and typists would not be added to the project. Could you dispute that?
That’s a relief. I was increasingly convinced you knew absolutely nothing about the secret world.