[AnonC]

As I recall, this is outdated information. Internet Archive does respect robots.txt and will remove a site from its archive based on robots.txt. I have done this a few years after your linked blog post to get an inconsequential site removed from archive.org.

[dredmorbius]

The most recent notice IA have blogged was in 2017, and there's no indication that the service has reversed course on robots.txt since.

<https://blog.archive.org/?s=robots.txt>