Yeah, reminds me of the "Security" xkcd (https://xkcd.com/538/) - a threat from a good ol' 5-dollar wrench defeating state-of-the-art encryption.
Never estimate how state actors can use violence (or merely the threat of it) to force people to do things. The only way to respond to that is not through code or algorithms or protocols, but through political action (whether it be violent or non-violent)