Once did some programming/networking work for a company that did the networking of a office sharing building that Coinbase was running out of. Early in my work there I noticed that the company had its admin passwords written on a whiteboard -- visible from the hallway because they had glass for walls. So I sent them an email to ask that they remove it (I billed them for it).
Their fix was to put a piece of paper over the passwords.
What a time.
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