Aristeia

I fear this kind of thing is more common than it should be. I used to train with someone who was known for, while demonstrating pins, ignore the tap under the guise of "giving uke a good stretch"
The tap should be absolutely sacrosanct. I know much more about how my body is responding to a pin than you, so when I tap you stop, no question. And as is often the case with these types, it was always so much worse when any kind of audience was watching.

It's weird, on my (and pretty much any) BJJ mat, if there was someone who did not respect the tap it simply wouldn't be tolerated. But I saw it in Aikido enough to disturb me. I wonder what's behind it...