The guys and girls at google do like to have fun. Yesterday in their robots.txt file the included the following code (in fact it’s still there, but probably won’t remain there for long).
User-agent: Kids
Disallow: /tricks
Allow: /treats
And last year they also had a special edition :
User-agent: zombies
Disallow: /brains
11.1.2009
[...] Blackdog Share and [...]
11.2.2009
I saw that myself, I still think Twitter did it better for halloween this year
11.2.2009
Hi Leo, yes, what twitter did (link) was quite creative, sadly I missed the fun myself as I was being devilish offline !