On that note, the page linked is hereby released into the public domain. Of course I don't own it, but as indicated on the page itself, the referrer specifies the license.

Where does it say that on that page? It says "Thank your (sic) for accepting the license agreement.", but it doesn't say anything about 'the referrer', and in fact links to the license agreement that it claims we've accepted.

It doesn't say anything like that on the page, but it does in the URL: publishing_this_url_is_probited_by_the_license_you_accepted_getting_here_from_the_previous_page.

The previous page is, by definition, the page you were viewing previously. Which could be almost any page, including this one.

But does the document say the URL is meant to be read as instruction or agreement?