Re: Ethics in Aikido
FWIW, the last person who was banned from our dojo had been consistently failing to pay dues, while claiming to whoever happened to be teaching that day that he had settled his account. (Senior students teach a number of classes, but don't have direct access to the dojo's financial records.)
The person before that had been making inappropriate and unwelcome advances to another member, and continued this behavior after being warned that it was inappropriate.
There are aikido instructors who have gone to jail for assault, for inappropriate relationships with minor students, and similar behavior. Now *that's* egregious behavior. Being rude to a shihan? Not so much.