I mean, I get the motivation: You're working on a boring, dry, SeriousBusiness project, and have a creative itch that needs to be scratched. We all have a nonzero desire for a little joy and irreverence at work. But, man, scratch that itch with hobby projects, not stuff that's going out into the public! Or start a "wear a funny shirt day" at work or something like that. I know this is unpopular and makes me look like Debbie Downer, but our projects already have enough technical risks without deliberately adding more.