

It prob is a “some culture warrior/bodybuilder misread a piece of research and it turned into a culture war conspiracy” thing. Like soy. (My silly nickname predates the culture war stuff by several decades, it comes from Shadowrun).
E: yes looked it up, comes via RFK of course and is anti seed oils thing. https://www.diningandcooking.com/1742624/america-stopped-cooking-with-tallow-for-a-reason/ and the anti seeds oil thing is an idea that has been spreading through the (far) right blogosphere for a decade or more (that is when I heard of it, so prob existed before that).
Our friends of the pod at lw also joined in https://www.lesswrong.com/posts/DHkkL2GxhxoceLzua/thoughts-on-seed-oil (but it concludes the seed oil theory is full of shit, points for LW there, well done (dont read the comments, there is roundup in the seed oils)).
Also not that this ‘key was generated by a person once’ stuff does not validate personhood, it just means an identifiable person was involved once. So, it can be used to blame somebody, not prove personhood