Did you get written consent to provide that link? Their TOS says you have to: "8. You may not create a link to this Site from another website or document without WAIL's prior written consent."

I never visited the site, so I didn't have to agree to any ToS, but I heard http://internetatlas.org/ contains interesting content.

This doesn't seem legit. The map is on public Internet, so that's like putting an ad on yellow pages and forbid anyone to call. Add authorization if you need access control.

I wonder if any of the crawlers in the world care. What a ridiculous thing to put on a website on the public internet.

Seeing as how they don't have a robots.txt, probably not.

Holy shit, that's literally the funniest thing I saw on the Internet this month.

I can imagine how such an idea could occur to someone completely non-technical, but presumably authors of the site are somewhat knowledgeable about the Internet...

Even more direct link: http://atlas-test.wail.wisc.edu/InternetAtlasLimited/