[Timothee]

You can probably make that happen with the QMK firmware: make the whole thing stop two hours after being plugged in. Or have a key sequence to restart the timer. (so that you don't have to unplug and plug it all the time)

That'd be an interesting feature honestly.

[autocorr]

The keyboard in the submitted post comes with a buzzer built-in. I think they had one in the Planck that beeped when it turned on or connected to bluetooth or something. So you could program QMK to do this almost certainly! :)

[VectorLock]

And also negate your ability to by-pass it since oops your keyboard doesn't work any more.