There was thread on practical machinist forum about a guy who was looking for a way to use a shell of unknown potential he found for something or other, don't remember the age of the ordnance- The comments were enlightening!
People still get killed every year by this sort of thing.
Gotta ask, though- with all the WW2 movies and documentaries, even a non military person should have SOME idea of what a grenade does? And what the pin is for?
I was watching some documentary about Vietnam combat vets returning to the country to reach some inner resolution or something, they are on an old battlefield, and one of them KICKS an unexploded mortar round sticking out of the dirt. In an area where every single piece of scrap metal has been collected by the locals.......