Yeah, or they could say "screw this guy, he didn't even give the normal procedure/means a chance" and send you yours back with 'rattling insides' and a non-functioning system again. That was really short sighted. I know that'd piss me off if I worked at Microsoft. (or any other company that you, your friends, or anyone else with a similar idea tried)
You do realize the BBB has better things to do than investigate claims because people are too impatient, right?
If your car breaks down under warranty, do you just file a BBB claim rather than take it to the dealership? Come on.
Sorry man, I hope they don't give you jack.

You just screwed over everyone else in the world who had a malfunctioning 360 before yours who were waiting patiently for theirs to be repaired, because you have no patience. You also just screwed yourself over to from complaining like this. You do realize if they don't do anything for you (which is highly likely, all they have to do is reply to the BBB that they have a free of cost repair service in place and the BBB dismisses the claim) that you're screwed now. Good luck getting your replacement in any reasonable time frame now; they'll probably throw yours back in the back and get to it
eventually sometime this year.
I suppose when you eat at a restaraunt and complain about your food (above and beyond reasonable) you expect to get your food served again without being dropped on the floor or spit on too.