Tom, Doing it the way you describe really isnt batoning, I have done this before on bones and pelvis' etc. I have no problems with that! But hitting the spine of the knife to drive it through something hard... well I just feel that the hollow grind on the knives is too weak for such abuse and I have seen too many pics posted here to say its not abuse

And occassionally the saw does need to come out, but only if its along!
I agree Jim, i described the way i split the pelvic so batoning can be avoided, i would only hammer on the spine of my knives as a last resort in an extreme situation, so i feel batoning is abuse, a knife is for cutting/slicing so if i want to chop or baton i use my hatchet.