Yes but if it were to be a pure antimeme, wouldn't being able to communicate about it be irrelevant, since it would remove itself from both your memory and that of whoever described it to you, as if nobody had ever described anything? I at least see it this way, and believe that if we were ever confronted with such a thing in the real world, all references to it would be imperceptible in any normal non-momentary context.
That is correct. I'm pointing it out because the "non-communicability" aspect is a whole genre called "infohazards", which is any SCP triggered by or involving communication. It's a very popular tag.
You might contrast with SCP-2521 that attacks those that use written or spoken language to refer to it, so the documentation page is one giant infographic without text.[1]
