Boredom. Because of covid-19 and the fact that no particular nation is required by maritime law to take on shoreleave-seekers, crews have been at sea for between 2 to 3 times a standard rotation. You find your own way to make your fun.

It is pretty funny though. I have to imagine the captain realizing his track had been discovered is every developer who ever put a comment like /* this is stupid but I'm doing it because my boss is also stupid */ somewhere in a million lines of code, thinking it would never come up in an audit.