It has been a pattern all game long.
I'm moving around, and I hear gunshots. Is it one of my provisioners? Is it Trashcan Carla standing next to a car about to get thermonuk'd out of existence? Better safe than sorry, so I rush towards the sound to make sure no one important is about to get killed. I wind my way between buildings, around raider camps, and over the hill until I see the source of the gunshots, and it's the frigging Arts. Again. For about the thirty-fifth time.
So this latest time I ran through the Fishpacking Plant's pier searching for the sound of gunshots, and came upon the same scene again. But before my eyes could roll back in my head so hard they gave me an aneurysm, I saw something new: The Art was shooting... a Super Mutant Warlord, and it was pissed. It made short work of him, slaughtering everything around it. I would have thanked the Warlord, but I couldn't... so I killed him instead. I felt bad, because he deserved better.