I have. I don't personally think it is of much value here. Someone saying you can't play an Illrigger Flumph because this is a Planejammer campaign, not a Spellscape campaign, is not being an "ostracizer," which seems to me to be the only one of the five alleged fallacies (which are actually just falsehoods) even remotely related to the topic at hand.
I could see a--weak--argument that #2, "Friends accept me as I am," might be claimed if one is asserting that a refusal to permit X is a denial of your identity. I just...don't think that that is true. I am not a dragonborn. I like them; I appreciate their style, aesthetics, and prototypical culture; I enjoy analyzing how their different physiology would affect them culturally vs humans; but I am not one. If a person genuinely believes that "dragonborn" is part of their actual identity, they have much bigger problems than the alleged Geek Social "Fallacies."
That said, the author does point at the actual fallacy which underlies the use of these falsehoods: the motte-and-bailey. Anything you can summarize as, to quote the article, "It’s difficult to debunk the pathological [claim] without seeming to argue against its reasonable form", is a textbook motte-and-bailey fallacy, which is a specialized subtype of the fallacy of equivocation, as it treats an unobjectionable true (but often trivial) claim as being identical to a much stronger but quite debatable claim.