In the tutorial, the very first card I was presented with was reported for being "illegal", and the description was (from memory. I might not have it quite right) "A post about the movie Cocaine Bear recommends doing cocaine while watching the movie and contains a photograph of a bag of white powder with the hashtag #cocaine" That... seems like an obvious joke to me. And even if it's not, while "doing cocaine" is ill…
Services based in the US are not legally obligated to prevent users from writing about using cocaine, or pictures of white powders they're claiming are cocaine, or writing that it's desirable to use cocaine, so the post itself is not illegal. Real policies for content moderators should be much more detailed than what's in this game so that most moderators will reach the same conclusions about whether a post violates the policy.