As a longtime editor who makes heavy use of archive.today (it's often much more effective than the Wayback Machine), I'm deeply conflicted about this, and this is disgusting behavior on the part of archive.today; regardless of what a piece of shit the blog owner is, I hope they see prison time for abusing their trust to perpetrate this DDoS.
Right now, the Wikipedia RfC seems pretty split. This is a complicated issue, so I'm going to need to read and think more before I chime in. Just wild.