Upon further review, I am beginning to see the issue. Archive.org is not just archiving vast number of websites that once existed, and also backing up sites that still exist. Archive.org is a vast online library and repository of digital content. Wikipedia often links to this content. For example, if you research into the rather fascinating character of Alberto Rivera you will find the Wikipedia article. The Wikipedia article links to Archive.org which has content that some might find objectionable. Alberto was an ex Jesuit priest who did a tell-all. Wikipedia does already get brigaded and editors routinely "camp" on pages. So it is already somewhat broken. And yet, Wikipedia, Archive.org, YouTube and Google Books all have vast archives of content that was pretty much in accessible until very recently. Censorship here would be a notable development.