There’s currently two mobs that can be spawned by arranging blocks in a certain pattern: Snowmen and Iron Golems. If an Enderman produces this pattern, does it spawn a mob as if I had placed the blocks?
In other words: If I have a pumpkin farm next to an igloo, do I have to worry about my walls spontaneously turning into Snowmen?
Yup, they sure can!
And here’s the reddit thread where they talk about it.