@brainwane idk if you would count it as such, but everytime we mention this topic, i also think of https://firesidefiction.com/carborundorum-dev-null as a prior art.
It is slightly to the side of this, and also directly in the center. If it makes sense.
And thanks. It is a good story and useful one. Also one i have used, showing it to previous partners, to explain why I am cautious giving advices, and why i recommend a password manager. Because it is too easy as a partner to install stalkerware under the guise of help