>Cryptography is a tool for turning a whole swathe of problems into key management problems. Key management problems are way harder than (virtually all) cryptographers think.

As someone who has issues remembering where they left their house keys at times, I want this on a bloody coffee cup/t-shirt.

Further, every practicing cryptographer everywhere should be forced to keep one on their person at all times, and be required to present it to do normal tasks as a reminder to them of the suffering their work creates for others implementing their cryptosystems. They probably won't care. But it'd make me feel better if they were as annoyed in the everyday as much as I am wrangling this kind of nonsense.