Technically it's only a misdemeanor which is rather surprising. You can get a felony charge just for smoking pot sometimes but I guess they never found any pot so they can't charge them with that.
you figure there are things around to make bongs out of that aren't 4 feet under ground...
I also kinda wonder what their original intentions were...maybe they just went there to smash grave stones, then decided hey let's dig up a body, then decided hey let's cut the head of, then decided hey let's get stoned, and then decided it was an awesome idea to make a corpse bong.
It said that they did this over a two day period. I guess they really wanted to smoke out of a head that's been buried for over 80 years.