Re: Injury and Responsibility
I'm the Mama in my dojo--making sure folks throw toward the outside of the mat so no heads clunk, suggesting we work in groups instead of pairs when space gets too tight, generally trying to be sure no one is hurt. I probably err too much that way, though Sensei tells me he can't fault me when safety is my concern. Safety is the number one rule in our dojo.
I teach a college aikido class also, and I see a good bit of testosterone and youthful exuberance in a class full of 19 year olds, so that's probably why I've gotten in the habit of being overly vigilant.
I'm sorry to hear about folks intentionally injuring others.