I put an Easter egg into a product, that if you enter the string "final countdown" into the stock code search field, it plays a YouTube vid of Europe's "The Final Countdown", in a hidden div. It's an in-joke for a few people in the company.

A well meaning maintainer with no sense of humour or judgement takes over and goes on the warpath against any hardcoded strings. The secret code gets moved into a config file.

A third developer changes the deployment script so that it clears any configs that aren't explicitly set in the deployment settings.

So the secret code is now "".

Literally every PC in the stock buying department is now blaring out "The Final Countdown" at top volume.

...Except none of them have speakers, so it remains this way for over a year and two more changes of maintainer.

I just noticed this afternoon and quietly re-hardcoded the string. The buying dept.'s PCs will silently sing no more.