If they had a policy to ban German speakers from submitting code to OpenJDK, it would have the same effect. None at all, which is maybe the point. It's another tool to categorize submissions/submitters they find problematic.

"If I don't know you, I don't merge you"

And if you catch somebody submitting code they can't explain, you don't know them anymore.

It's really simple. Open source has always had a social layer. Github culture tries to eliminate it, and that's the source of this vulnerability.

First thought I had too. I deliberately strip AI metadata from my PRs in certain orgs.