The exceptions are simply not apliccable on a large enough scale but they do point to the white court being evil.
But is it the feeding by the Hunger Demon that makes them evil or their lust for power in general?
Back to Thomas as a hair stylist, Evanna just didn't say he was a great lover, she called him an
artistof love making, none of that if controlled can be called evil. In general we've thought, and Harry has thought that there is nothing evil about Thomas, but then there is that moment on the beach.
Peace Talks page 3
Suddenly he looked less like a human being and more like something carved out of marble. Angry, angry marble. I felt my shoulders tense up in the presence of a creature I knew was genuinely dangerous.
When has Harry ever called his brother a "creature"? That is a dehumanizing label, perhaps it
was that vision of Thomas that allowed Harry carry out the imprisonment of Thomas on Demonreach?
But back to the White Court in general, if they quietly went about their feeding, not killing or really hurting anyone, they might not be considered evil. However it is their lust for power and dominance over others that is evil. So is that the Hunger Demon or the human host that is evil?