I’ll go first: r/kitty. One of the hundred grillion cat subs back on Reddit, the culture in this one was you posted a cat picture, and the only word allowed in the title or in any comments or replies was “Kitty.”
Someone is using that subreddit for covert communications, I just know it. Either on the level of “if u/PM_me_your_nostrils posts an orange cat, we attack at dawn!” or there’s some steganography going on with the pictures, but that subreddit was too stupid to be as active as it was.
They actually do use software to find deniable claims that would theoretically have to be reviewed by a doctor. The doctor pulls up a while page of to be denied claims and theoretically gives them the legally required review all at once in the 30 seconds before he hits the button. There is no reason NOT to feed propensity to accept fake denial into the equation. You could even white wash it by presuming that prior denials that stuck were indication of bad claims and assert you are measuring their proclivity for filing wasteful claims.