It's called "America's Last Line of Defense," and it is a network of satire websites run by self-professed liberal troll Christopher Blair from Maine along with a loose confederation of friends and allies. He runs several websites and Facebook pages with visible satire disclaimers everywhere.
They mostly publish made-up stories with headlines specifically created to trigger Republicans, conservatives and evangelical Christians into angrily sharing or commenting on the story on Facebook without actually reading the full article, exposing them to mockery and ridicule by fans of the sites and pages.
Articles from Blair's sites frequently get copied by "real" fake news sites who omit the satire disclaimer and other hints the stories are fake.