Two examples that still haunt my mind....
My aunt was hanging wash in her development and was shot in the arm by the Township Supervisor out shooting groundhogs about .75 miles away w/ a .22.
I work in a Trauma Center ER, a hunter came in last year who was shot by another hunter who thought the other guy was a turkey in a tree. He was around 260lbs and was wearing bright orange pants, vest etc.
I guess there is no real avoidance of stupidity. Oh well, I just continue MTBing on Sundays and just keep my eyes open for flashes of orange while riding through wooded areas on the road.
Safe riding!