So, this SCP was directly inspired by We Need To Talk About Fifty-Five and the Antimemetics Division Hub. In fact, it's inspired by the very first line of the hub:
An antimeme is *an idea with self-censoring properties*; an idea which, by its intrinsic nature, discourages or prevents people from spreading it.
Now, the overwhelming majority of antimemetic articles on the site are those which deal with memory - anomalous effects which prevent your ability to recall them, and then act on them - but whenever qntm defined an antimeme in the original series of the Antimemetics Division, the definition often had little to do with memory and follow the above - the idea which cannot, for whatever reason, be communicated. I believe he once called 2521 antimemetic.
So, I was rather … intrigued by the lack of antimemetic content outside of memory stuff. Everything tends towards that one concept, which has a lot of room and is cool. But the definition implies for a much broader definition, one that includes stuff like this. The incommunicability of the memory stuff is a consequence of forgetting, rather than the primary anomalous effect.
That's fundamentally what inspired this SCP, at least the anomaly. With that in mind, I felt like I couldn't not call it an antimeme: it's a linear evolution from the definition.
Does it fit the general conception of antimeme on the site? Not really, no. That is the case. It's a very different concept, but it is designed to fall under the given definition.
It's also worth noting that, of course, it's not an antimeme, but a novel antimeme, in that it is unique and unusual. There is an acknowledgment it is not a traditional, memory-related antimeme. The mechanisms by which it inhibits memetic spread are not the normal type of antimeme. It's also not handled by the Antimemetics Division but the Department of Miscommunications, since it does slot into their wheelhouse better.