Farmer42
Orc in the Playground

I've heard that, in the wild, if one DM encroaches upon the territory of another, the offended DM will attempt to assert their dominance by throwing sacks of d12s at the intruder. If this activity proves fruitless, the DM generally shrinks back to their den in defeat, relinquishing the land, only to blog about it on their MySpace later.

. . . the designers probably felt weird giving monsters Schrödinger's hit points.