Datanerd's Corollary of Godwin's Law

I was reading an article about a document connected with the Kent State shootings showing up on Antiques Roadshow. There was the usual discussion of how could they put a price on a piece of history, and how it was in bad taste to think about selling something so important. This quote struck me:

As far as Lawson is concerned, May 4, 1970, is equal to Sept. 11, 2001, in its impact.

"Between 1970 and 2000, what other event was as significant in American history? I think it's great that Steve Thomas has (the document) because he knows the significance of it. This isn't a day we should forget. We started shooting our own.''

Soon, as a discussion of anything grows longer, the probability that someone will compare it to the terrorist attack of September 11, 2001 will approach one.

And, like under Godwin's law, mentioning September 11 is probably good enough to end the discussion because people are getting out of hand.

From the Jargon Dictionary:

Godwin's Law prov. [Usenet] "As a Usenet discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches one." There is a tradition in many groups that, once this occurs, that thread is over, and whoever mentioned the Nazis has automatically lost whatever argument was in progress. Godwin's Law thus practically guarantees the existence of an upper bound on thread length in those groups. However there is also a widely- recognized codicil that any intentional triggering of Godwin's Law in order to invoke its thread-ending effects will be unsuccessful.