One of my pet peeves in RPG's. Take Mask of the Betrayer, for example: in my last play-through, I willingly devoured the spirit of an ancient, powerful, and majestic spirit and then used his withered husk to create an undead construct from a thousand screaming souls trapped in an ancient crematorium; I tricked a perfectly harmless and innocent trader into getting eaten alive by a tribe of cannibals, then picked through the bones for loot; I condemned the soul of a wise and good old woman to eternal torment by commanding my undead construct to absorb her soul into its multitude and so force her to servitude; finally, I devoured the soul of a suffering and wronged character because I wanted her power.
And... I ended the game as Chaotic Good (0/100), which got me a wonderfully rhapsodic description about the peace, warmth, and serenity that reigns in the deepest recesses of my soul. Why? Because every use of my Eternal Rest feat (which I used to sate my hunger, because it would not increase my Craving) and my Channel Energy feat (which I used to heal myself and my companions/servants in order to win battles) bumped my alignment 2 points towards Good. That's just... wrong.