The alert now appears on many pages on the archives.org website, and links to a page entitled “NARA’s Statement on Potentially Harmful Content,” which they define as:
Bizarrely, the warning does not appear on a page about Jim Crow, which has no fewer than 6 uses of the word “n*gg*r.” Nor does it appear on a page with the word “k*ke.”
It does, however, appear on the page of the U.S. Constitution: