That verse came to my mind as well...
Your comment was well put. I think a lot of us are troubled by her message and the implications it has for our romantic ties to the county. It seems everything has a seam or thread of darkness intertwined with that which is good. It's an age old battle and one that continues until the end. Pursue the truth, for it and the Almighty will set men free.
Remember that crazy ol' character Gene Scott? Now that guy was running his own personality cult and web of deception but one thing he used to say was the spot on truth: the devil likes to camp out on the truth.
While the irony (or rather, projection) was that he and his "ministry" were doing exactly that, he inadvertantlty provided a whole 'nuther avenue of understanding. The catch was do do exactly as he also said, only WRT his own teachings-- don't park your brains at the door of a church.
I mention him because I often think of the "devil camps out on the truth" concept. The bigger the message, the bigger the camp. That has really become SOP in the information age. The media is always camping. The truth can't be hidden outright, so it must be twisted, perverted, redefined, and presented in such a way that people either will dismiss it as crazy talk, or so they won't even realize that what they are being told is a lie.
Your seam/thread of darkness metaphor is an excellent analogy. Black and white threads wound together, or a small b/w weave on a fabric, will look gray at a distance. Different ink/pixel concentration on a printed page can produce varying shades of gray. Words are designed to describe objects, concepts, and actions, but are maliciously used to mischaracterize these as well.
Another passage that came to mind regarding the stenographer (scribe):
Luke 19:37-40
37 And when he was come nigh, even now at the descent of the mount of Olives, the whole multitude of the disciples began to rejoice and praise God with a loud voice for all the mighty works that they had seen;
38 Saying, Blessed be the King that cometh in the name of the Lord: peace in heaven, and glory in the highest.
39 And some of the Pharisees from among the multitude said unto him, Master, rebuke thy disciples.
40 And he answered and said unto them, I tell you that, if these should hold their peace, the stones would immediately cry out.
The message will get out even if it is delivered by a rock. This lady could have been a rock; it doesn't change the message. Whatever/whoever does the job. In the NT, even those possessed by devils would come out of the rocks and bushes and start blurting out the truth.