Pale Garden Petrifies Mobs

It seems very important to me that no other mobs should be inside the Pale Garden other than the Creaking to preserve a sort of lonely environment. That being said, even with spawn rates off, mobs will inevitably wander into the Biome as seen in Minecraft Live. It would be cool if mobs that wander into the biome get petrified and turned to wood. Therefore on the outskirts you can find the frozen mobs that leads to a more unnerving environment. You can then mine them to get pale oak logs.