Whatever, gray suit man.
"""Those were very different times, I guess."""
No, today still there are huge multinational companies that allow their programmers to have fun doing similar things. Besides there being nothing "unprofessional" (sic) about it, it also can bring in tons of good publicity and viral interest.
I do all my work in big companies and they have all been universally against humorous test data, humorous naming conventions, or an sort of Easter egg.
Cite?
Just a few week back, wasn't Google rotating the whole browser page for a specific query?
http://www.gtricks.com/google-tricks/do-a-barrel-roll-google...
Google has tons of other easter eggs. Here is a Top 17: http://www.pcworld.com/article/142620/googles_top_17_easter_...
Apple's Siri contains easter eggs referencing "2001: A space odyssey", "HHGTTG" and other stuff: http://www.theverge.com/2011/10/12/2486618/siri-weird-iphone...
In MS Outlook 2010, the default picture for new contacts is a silhouette of Bill Gates from his "arrest mugshot".
Facebook has several: http://reface.me/hacks/facebook-easter-eggs/ http://www.yesbutnobutyes.com/archives/2009/05/facebook_east...
Adobe has included easter eggs, here are some for the CS5 suite: http://www.youtube.com/watch?v=lEmO9-RsVgQ