I saw plenty when I was a paramedic. Worked a plane crash when a Beechcraft Bonanza crashed into the ground at 210 mph with 4 people on board. I'm still trying to forget that one.
I have found that it was the live ones that are the tough ones to deal with.
Jim, I guess I've been lucky so far. Whenever we get to a call, the family/friends leaves us alone. Sometimes it's a little hard to get info from them, but never a confrontation.
The one that sticks with me was listening to a little kid...probably less than two years old...bawl for its mother in the waiting room.
I was zipping up the body bag at the time.
You are right though....usually folks are pretty good about it.