I think people used similar prefixes for a long time. For example, Haskell has had `unsafePerformIO` since the 90's... and MSFT's Hungarian notation was also similar, though it used abbreviations for things like "unsafe" (not "dangerous"). Perhaps React was the most famous case of using "dangerously" though.
"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:
https://github.com/reactjs/react.dev/issues/3896