there's also a block component to that as well, his 'qanon' blocklist is something you toggle on and can manually edit it via ui; it pulls from a github he runs and contains leftist sites like grayzone as well as sites like wikileaks.org.
here's how the interface works, you either click every button on the list or edit the database/use a different one

quoting davel here:

domain blocklist, which is not mandatory on install—though most new instances choose it—and can be removed by an admin with either the patience or the database skill to remove it.