I think the issue was not the rider out riding his bike...but out riding his skill level...aids only assist, you still need to ride the bike ya know?
Plus i heard that this rider was hanging back away from the group lead and gunned it into the turn making it break loose.
Now for the instructor that went down earlier in the day...no idea what happened there. He just laid it down and the next thing i know i saw the bike upside down mid air.
I agree, I think a lot of people there had never done a track day despite it saying "experienced." We were going so slow to moderate pace you didn't even need track experience to keep up, very little lean going on, just enough to feel the bike out and it felt super comfortable.
BTW, where were the pictures posted from the track day?
2016 B&RR s1000rr Premium