Better safe than sorry? Why is that disappointing that they "fixed" it quickly? Heck, just look at the comments in this post and people are already pulling out that tired "Don't be evil" quote again and trying to blame Google for this or somehow associate this as some kind of evil action.

Or the more likely cause, which it was an easter egg. Google got caught with it's hand in the cookie jar, and removed the offending code before it got in trouble.