My pwnagotchi uses a Waveshare e-paper screen. On shutdown, it continues to display the most recent screen update after shutdown is complete.
My suggestion is to add an opt-in “0xFF, 0x00, 0xFF” style screen-blanking function to pwnagotchi’s shutdown sequence so that not only is the screen cleared of all information, but ghosting is cleared as well. That way when it’s not running, and hanging from its carry loop on the enclosure, it will garner fewer Questions from Strangers.
I am going to work out the details of implementing this myself but at the moment… DNS (it’s always DNS, right?)