Running through an area full of low level adds can take far longer than it should since if they hit you, they'll put you into combat and slow you down a lot. But these low level adds do less damage than 0.05% of my total health. I heal faster than they can hurt me. They actually can't kill me. If I decided to attack them, I should go into combat, but going into combat and getting ready to fight something that has no chance of killing me is just silly. I can put up a shield and they'll one shot themselves. But that puts me into combat, too.