Enemies without targets should move randomly

[Grey]

Cause, y'know, otherwise they're a bit dull. Plus they look a bit silly standing around doing nothing when you can see them but they can't see you back. Let them move about randomly, add a bit of brownian motion to the map.

[Final Master]

Or, you know, let the npcs in towns do ... anything. The towns may have people, but they may as well be statues or dead.