The Dilbert's lates comic is on the topic of black hat SEO. Dilbert wisely decides to avoid those tactics. Here's what the comic reads:
"I want you to use "black hat" methods to raise our website's ranking on search engines."
"What do you like best about that ideas -- the fact that it's unethical or the near certainty of getting caught?"
"That's sort of a loserish thing to say."
"Talking doesn't work for people like me."
In 2002, one of Google's most famous special doodles -- was a Dilbert one created by Scott Adams that ran across multiple days:
It also later was placed on coffee cups. Here are some pictures of that from a cup that Danny Sullivan has: