Creepers (and other mobs) do not grief on Easy difficulty.

I propose a change so that on Easy difficulty, mobs such as Creepers, Endermen, Ravagers, the Wither, and the Dragon do not break blocks.

On Normal difficulty, they would break only naturally generated blocks—such as villager crops, leaves, dirt, and so on—but not those same types of blocks if placed by a player.

On Hard difficulty, however, they would break blocks just as they currently do in the game.