I was reading Righteous Defenses reaction to the latest Patch Notes and he had a link to some old April fools patch notes. They are still funny even now.
3 of my favorites:
Scholomance is now spelled "Sko-lo-mance" to alleviate confusion about its pronunciation. In addition, a sound file has been added outside the instance portal which will phonetically sound out the name upon zoning.
Edwin Vancleef will occasionally shout "Hey you guys!" as players fight their way through Deadmines.
Additional grass areas have been added to the enemy faction's zones. This grass is exceptionally green