Your very observant mylittlecivic! That's him, from Fight Club, the quote being"Is that your blood?""Some of it, yeah." Good job, you get 5 points.

(also my location is Paper St.

)
Anyway, I think my field is a little different. They have a general ten foot rule, but thats just if your sneaking up on somebody and are close enough to not miss. Then you just say BANG YOUR DEAD!! If the person turns around to fire at you still, then you have every right to pelt him silly.
When it comes to actual battle, then the ten foot rule is waived. You cant exactly say bang your dead when your spraying paint at someone while running around in circles, diving in bushes. Its just a rule so newer players dont get frustrated/mad when they get hit with a 280fps ball at close range.
And oddly enough, they discourage bunkering at my field! Unfortunatly, since this is my only field, I've never actually seen a bunking move done! I can guess what it employs, but still can you explain the specifics?