Mark Freeman wrote:
if there is 'bad' ukemi going on, then it is the Sensei who allows it.
Of course, that doesn't mean that 'bad' ukemi shouldn't/doesn't take place. The teacher should be close enough to all their students to know ( by taking ukemi themselves perhaps
) what each student is like.
This may not always happen, though, as some ukes reserve their stupid antics for their fellow students, and are as good as gold when they get hold of sensei...
It takes a pretty sharp-eyed sensei to spot that kind of thing IME.
These days I just make atemi towards the 'bad' uke's openings and then point out that I cannot do technique against that kind of attack as I am not a 10th dan