RFC 35140: The Do-Not-Stab flag in the HTTP Header
https://www.5snb.club/posts/2023/do-not-stab/
This document defines the syntax and semantics of the Do-Not-Stab header, a proposed HTTP header that allows users to indicate to a website their preferences about being stabbed. It also provides a standard for how services should comply with such user preferences, if they wish to.