talking with my wife about failure modes and robust design, and had the occasion to use the unique phrase "any failure mode that results in your bra being advertised with a picture of Hitler's face is not a good one"
@gsuberland I... do I want to know?
@q an online clothing shop decided they needed a placeholder image as a default for all unlisted sales items, and someone had the thought "hmm we should make it something that really makes it obvious we didn't set an image yet, so nobody can ever forget to apply an image", and thus the default foolishly became a picture of Hitler's face, forgetting the golden rule that all processes will eventually fail at some point.
@gsuberland @q even doing it "properly" doesn't necessarily save you -- https://devblogs.microsoft.com/oldnewthing/20071120-00/?p=24453
You even have to watch out for your placeholder bitmaps - The Old New Thing

During the betas of Windows Vista, the final set of sample logon pictures had yet to be determined, so a bunch of placeholder bitmaps were created. These placeholders consisted of the letters FPO in a box. FPO is a standard term in desktop publishing; it stands for For Position Only. In order to permit designers to […]

The Old New Thing
@r @gsuberland oh no… not the FPÖ
@q @gsuberland For Positioning Österreich
I was once responsible for website content management for a part of BT (BTexact if anyone remembers), and regularly used this placeholder, because pretty much all the images were advertising. Of course it leaked a few times...