Ok Google: please publish your DKIM secret keys
blog.cryptographyengineering.com
The Internet is a dangerous place in the best of times. Sometimes Internet engineers find ways to mitigate the worst of these threats, and sometimes they fail. Every now and then, however, a major …

Honestly, this is more in the weeds than my usual areas of interest, but the argument is sound, and moreover… is it a bad heuristic to think any idea getting That Response in the comment section probably has something going for it?