Hogewash! has been on the Interwebz for a bit more than two-and-a-half years now, and every single post, except one, is still available online. That post was the donation page for Tetyana’s Fund which was taken down at the donee’s request. Some posts have been subject to correction, but I don’t take down posts.
Not every website is willing to stand by everything it publishes. For example, Breitbart Unmasked took this post down almost immediately after it was put up.It contained a version of Brett Kimberlin’s story concerning his marital difficulties. It was a different version from any of the one’s he told in court. (And the version at each hearing was different from every other as well.) The post was taken down quickly when several bloggers noted the difference between it and the various tales Kimberlin had told in court.
However, the post has been preserved offline. And court transcript audio CDs exist of The Dread Pro-Se Kimberlin’s different scenarios presented to different judges.
IANAL, but I’m told that one of the exception to the hearsay rule is the production of copies of deleted records. The classic example is the case of a ledger from which one page has be removed be being supplemented by a set of contemporaneous photocopies that include the missing page. I suppose a 21st-century analogy would be a set of offline backups of a website.