Cixin Liu of course. Now let me tell you about “elbigbad’s Theory of Relativity” (hat tip to Einstein who had a hand in its development). More modernly phrased: “‘You miss 100% of the shots you don’t take’ -Wayne Gretzky” - Michael Scott
The right analogy would be "elbigbad's Theory of Relativity of the Web", wouldn't it? Not quite so bad.
The problem is that the article was called "The Dark Forest Theory of the Internet", not "Yancy Dark Forest". IMHO it's like "Ultraviolet catastrophe of book collecting" or "Gravity well of Tinder" : general scientific theory /hipothesis used as metaphor of a thing. Of course Dark Forest is not as well known as previously mentioned theories (although it was mentioned by Kurzsgesat, so who knows), but the whole thing is clearly explained in the essay, and the author is clearly stating what Dark Forest is and who created it. Also, the original comment probably mentioned it as Yancy Dark Forest, as "The Dark... Of the Internet" written by Yancy, not as "Yancy totally original idea".