"unsafe" seems quite different from the "dangerously [...]" phrasal template. I don't think it's a stretch to suppose it was inspired by React. Still waiting for this one to catch on:
React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
https://github.com/reactjs/react.dev/issues/3896
This is sometimes exposed in front end browser code and I had an actual (non technical) end user email our support team last month asking if it was something they should be concerned about! God knows how they found it, I suspect everyone is now an AI-enabled expert at these things…