TheBigChief: I hate to necro a thread, but I can't find anything else about this bug. I just had the same thing.
I happened to come across the guy by accident while wandering around the camp. Since he had a special name, I figured it was best not to talk to him before the time, so as not to cause a bug, but my decision caused a bug anyway.
Talking to a merchant didn't stop it. Meditating did not stop it. Entering a new area did not stop it. Saving, exiting the game, and reloading didn't stop it.
I had to reload a previous save to get rid of the thing.
Did you try to go inside the ring of candles? I imagine the constant yelling must be very annoying, much like the search for Odriiiiiiiiinnn