In the days of the Wonderful Chaos that followed the Great Divergence, an eco-poetess by the name of Deirdre Skye briefly walked the stony pathways of our world.
In a narrow mountain pass by the large city of Crux-Lesslamb, she laid down a wondrous spell, by which the conscious verbalized thoughts of anyone in a specific area of the pass, no wider than 1000 paces across, are heard by everyone nearby as if they were whispers uttered in the voice of the thinker. Sometimes, during clear winter nights under a half-full moon, even flashes or whole episodes of visual memory are experienced by all near the person reliving the memory, with the certainty of the identity of the memory originator stamped somehow across it.
How (if at all) would the locals make use of such a place?
Inspired by a previous question here.