I've been communicating with my Saobmnim about this over the past few days. He echoed some of the concerns that some of the joint-moves and throws get pretty violent and that without good control (coming from a lot of experience) some things are hard to keep 'safe' and that when competition comes into play, staying in control and 'safe' gets difficult.
On the other hand, he agreed with the principle and thought it would be good to do, in theory. Finding people dedicated enough, or crazy enough, to actually particpate..twice..would be hard.
He did, though rachet up the self-defense a bit yesterday. Rather than say 'ok, this is self defense against a punch', he just stood there and said "I'm going to attack...defend based on the attack". I did two things 1) try to recognize/react as quickly as possible 2) tried to go through the defense sequence as 'instinctively as possible' I probably only should've worked on one at a time bt my mind was clouded by the increased adreneline/stress.
Frankly, I sucked pretty bad, but it was very enlightening and very challenging and I was happy my Sabomnim responded to my desire for more 'stress and dynamics' in self-defense training by giving me more stress and randomness