I'm starting to think that many tolerance-preaching people are the most intolerant bunch by far.
Easter eggs can certainly be problematic when used in APIs (or similar) where access is intended to be automated (and therefore vulnerable to surprises).
But in user facing code, easter eggs are perfectly fine.
Yes, Google is a corporation and yes, Google tries to build a product people want to use.
(Building things that people like is a good thing.)
That said, I've put a small number of user-facing easter eggs in publicly-traded MegaCorp code before. In every case, it was an inside joke among devs that the higher-ups never knew about it. The C-Suite is uptight and we definitely would have been reprimanded if they were aware.