WP has the tagline "Democracy Dies in Darkness" and I think the blog post title is a spoof of that.

Maybe we've been reading it wrong. https://en.wikipedia.org/wiki/To_Serve_Man_(The_Twilight_Zon...

I believe that tagline is a threat.

I've heard that too, but it's visible in the blog post.

If you visit their homepage from a desktop, it's right below their logo.

Still visible on desktop but not anymore on mobile, it seems. Grey on white (provided your browser requests light mode) is also less easy to spot than their earlier white on black. So I for example was sure it had disappeared until you prompted me to recheck.