Originally posted by That guy with the Spoon:

how does this make any sense? you invade a biome and it's inhabitants just let you pass through?
also what about leveling up skills? i wouldn't want less stuff to kill and loot for food or crafting resources.

The inhabitants only let you pass after you kill a few hundred of them. You can still hunt everything, it would just be as if you were becoming known as a predator in the area