"Do you know what happens when the world is deleted?
When an ignorant player disgraces all life present in the world that he or she created...
When a player is so sacrilegious that they CHOOSE to ignore all these lives...
Villagers. Pigs. Sheep.
They will rebel.
They're families, ancestors; previous generations, all killed by the player.
The world starts disintegrating. Any NPC in the way of this disintegration ray is burnt in a very violent and painful way.
So be careful when deleting your worlds, you player scum.
Because we will revolt."