Whose law is it, anyway?

Burke's Law? No, not that one.

Hartman's Law of Prescriptivist Retaliation: "any article or statement about correct grammar, punctuation, or spelling is bound to contain at least one eror."

McKean's Law: "Any correction of the speech or writing of others will contain at least one grammatical, spelling, or typographical error."

Skitt's Law: "Skitt's Law, a corollary of Murphy's Law, variously expressed as 'any post correcting an error in another post will contain at least one error itself' or 'the likelihood of an error in a post is directly proportional to the embarrassment it will cause the poster.' The effect is, of course, magnified a hundredfold if the post is in reply to Skitt himself."

By way of a post at Language Log which settles the question of whether we are ignoramuses or ignoramii, and does it without begging the question.

Let's see, if every post with an error drew a post which had an error, which then of course would draw another post, which would also have an error, oh my! The next thing you know, all the pixels would be used up, and the Internet would implode, leaving nothing but email and a few listservs. Good for the old carbon footprint, I suppose.

I know why this post has an "SF" tag. Do you?
Update: Answer in the comments.