I remember goofing off with my college roommate's Fallout 3, and in the first town (the one with the bomb), I tried to steal something from a random building just for the hell out it. An NPC apparently just happened to walk by right as I attempting the steal and attacked me. I smacked that bitch down. The entire building, including all passers-by, swarmed into the room to attack me, and I was forced to mow them down. Afterwards, I discovered that the building I had been in was a church. Yes, I had just massacred an entire church.