Comic Sans is probably one of the most misused fonts out there. Originally intended for the comic book-style speech bubbles for “Clippy” and other assistants in Microsoft Office, it got used first for “fun”, “childlike” documents and signs, and then found its way into far less appropriate venues, including those shown in the photos below:
The Comic Sans Criminal site does a great job telling the story of Comic Sans, where people went terribly, terribly wrong with it, what the appropriate uses for Comic Sans are, and it ends with the Comic Sans Pledge:
Check out Comic Sans Criminal! It’s a beautifully-designed site that makes use of some good HTML5 tricks to turn it into an entertaining and gorgeous slideshow, and if it stops you from using Comic Sans inappropriately (or even better, altogether), so much the better!