Who is at fault if someone backs into my car while I was parked in front of my house in the red zone?

Yes, they are at fault.

Yes, unless you were parked in a place were you are not supposed to be, and that caused the accident. For example, if you are parked in the middle of a highway at night, and a car hits you, it might be your fault because you are in the middle of the road and drivers would not expect to be on the lookout for parked cars, and would likely not see your car in time to stop because of darkness. I cannot tell from your description (I do not know what a red zone is) whether your parked car was in a position that it could cause people to hit it without first seeing it.

What is a "red zone" is that posted "no parking" normally when someone strikes your car they are at fault. If your illegal parking contributed to the matter the insurance company may refuse to pay you have to be lilly white in law to collect anything in NC.

Yes. Your being parked in a prohibited zone does not grant a license to the neighbor to not watch where he or she is driving. My opinion is that their insurance carrier should pay.

You are both at fault because you are parked illegally, but you are correct he/she would have the ability to see your vehicle and failed to see it and act accordingly, however, the argument is absent your parking where you are not supposed to the accident does not occur. However, assuming you were not in the vehicle the only issue is property damage and your insurance carrier will cover the repairs.