Apples and oranges. When you go to a baseball game you understand and accept that baseballs will be flying through the air and if you're not paying attention you could get hit by one. You don't go to a park expecting that you may get hit by a drone. Baseball players don't need to know better. That's why they are there - to play baseball in an area designed specifically for that activity. Drone pilots DO need to know better. Understand how your drone works and your own limitations and skills and fly responsibly. Yes, accidents do happen, but pilots need to be smart enough to know how to practically eliminate all possibility of injury to others. Not even worth a discussion.