There are some great bits of developer nonsense out there. The Co I joined back in 75 spent rather a lot of money on mainframes and owned a lot of its own cables. (Including ones to various Colonial outposts, such as the USA).
Anyway, we had a "messaging" system back in 75, built on the back of the HR/payroll systems. Plain text only, on dumb terminals, and lurid green text on the screen, but it worked. By the early 80s I could send messages to most parts of the Empire.
Planted all over the place were the names of the developers. The only one I remember as it was easy to find was one developer's name upside down at the bottom of the login screen.
When I asked why they were there, the reply was simply "Because we could".