He could have flashed, and he just didn't tell us. The story is very one sided and opinionated. My vote is we are feeding a troll.
I meant the 6th dan was flashing the badge, not the original poster.
If he was being an ass, then said 6th dan should have put him down with a good old-fashioned big hit (lovingly administered, naturally). She doesn't have to blitz him, give him just enough to show she could give him more if she felt like it.
Gives the poster (who seems to think that being associated with aiki-fruities makes him less of a death-commando: whatever) something to think about and that's that.
Instead, she hid behind the rank. Shouldn't have been necessary.