Cause Alliance toons are seen as heroes. They've got more of the
goody-two-shoes factor.
But if you read WoW lore, the evil bosses are virtually all
Alliance gone bad :x
And it seems they get corrupted much easily kinda like the Lich
King :x
Err they are seen as heroes only coz they look more normal and
in other lore, trolls and orcs and undead are always evil
