"a better course of action for the girl who did the negligent rescuing would have been to do nothing,"

Perhaps that is actually true! I certainly don't want to discourage good samaritans. Nor do I want them to be immune from suit if the totally fail to use common sense.

Several years ago I was first on the scene of an overturned jeep with a young girl pinned upside down in the inverted jeep. Hot fluids and "steam" all around. I crawled under the vehicle, protected her from the dripping fluids with my back, and stabilized her C-spine with a knee to either side of her head/neck. I prevented her from trying to drag herself out, which she couldn't have done anyway. While waiting for EMS, my biggest challenge came from another samaritan jumping up and down and hollering "it's going to blow..." and trying to drag us both out by the feet. Reason did not prevail with this samaritan, who would have dragged this severely injured girl (she turned out to have spinal fractures, fractured pelvis, ruptured spleen) out of the wreck doing untold harm. What prevailed was my wife's aggressive intervention removing the samaritan from the scene.

So I think I used good common sense, and couldn't have lived with myself if I hadn't tried to help. I also think that the other samaritan would have deserved a law suit. Heck if I'd been standing by instead of stuffed under the mess, that samaritan would have been the next case for the EMS folks.