I have to say, MDing in a cemetary isn't quite the same as graverobbing. I've hit a couple of very old cemetaries, but they seem to all be duds. I've never dug more than 4-5", nowhere near the graves themselves. For what I've gotten vs the decency factor, it just doesn't seem worth it. I do have to agree that it really isn't the same as an archealogical(sp?) dig, tragedies happen in random places, they don't close roads forever because of a fatal car wreck. On the same note those bodies are delivered to a cemetary, not out of some archaic "respect for the dead",but out of respect for the love and memories of the living. I will never say that a 4"x4"x5" hole is graverobbing, it's not, I will also never condemn anyone for MDing in a cemetary(I have an 1895 IH that I have no intention of re-burying from one), but I will say that it is definately something I will steer further and further from as I learn more about this hobby. The idea of 100+ yr. old soil looks good on paper, but the payoffs just don't seem worth it.
Incidentally, I do hunt FOR cemetaries, if you find one there is ALWAYS a town nearby, even if it's no longer on a map. They are also an amazing way to date an area.