GTFO and ENHANCE_YOUR_CALM are symptoms of an unprofessional design process.

I'd chose "having sense of humour" over "professional" every day.

it's a sign that the people designing it did so with the seriousness it deserves.

Or it's a sign that the people designing it are too serious, focusing on political correctness and not on doing good engineering. Creativity, care about the product and sense of humour often go together.