A bit of "gallows humor," eh?
I imagine the majority of donors come to you as a result of motor-vehicle accidents; I survived a nasty one 40 years ago when the car I was in was struck by a strong crosswind (Corvair) running along the Gulf coast in Florida and I was thrown almost 100 feet into the brushy dunes.
I had a hemothorax and a pneumothorax that was treated by draining the pleural chamber, but it wasn't until 11/2 years later that the doctor performing my exit physical determined that the persistent stiffness of my left thumb was a result of the same wreck - I had a severed extensor pollex longus; now, I can flex it fine after they grafted a tendon from my left forefinger.
Amazing what a bit of stitching can accomplish.
As noble as organ donation sounds, I don't believe we are yet at the point where it is the purview of the state to designate the donor.