Death Proof: Spoilery Discussion on Morality

I confess that I was internally cheering all the way through the second half of Death Proof, even at the primitive and cathartic ending. But this conversation and its accompanying comments gave me pause. Were other viewers really identifying with Stuntman Mike toward the end? Although the civilized response would have been for the girls to get Mike's license plate number and call 911, are we really morally deficient if we enjoy watching them take the law into their own hands (especially when we have seen, in the hospital sequence, that the law is unable to stop Mike)?