So I was playing a paladin; I had been wearing an amulet of order for a while, and at level 10 I got crowned with Justifier, killed Keethrax, gave the corpse to Guth'Alak and completed the quest. I had heard that the druid quest draws alignment towards neutrality; so, figuring that I was at 6000 white stones before killing Keethrax, I then (after chatting with Guth) read a scroll of balance.
You have a vision. You see a huge scale. The left side is empty. On the right side there are 6420 white stones. The right side of the scale weighs more.
Can anyone explain what just happened? Either the Guidebook is wrong, or cursed scrolls of balance lie. I didn't think to make a backup of the save before continuing, sadly.