Patch 0.7.2 includes a large number of improvements to the NPCs scattered throughout the world. We are revamping their visual appearance, animations, and positioning. Graphical improvements coming in the patch will enhance the effect of lighting on their armor. Additionally, some zones are now more populated than they were previously.
We’ve had a word with NPCs and asked them to stop shouting.
In Patch 0.7.2 they should stop talking to you if you walk away.