Have heard about this one, but seems old school and an issue with ego.
- asking a higher belt (who hasn't got a partner yet) to roll;
Same as above.
- asking to roll with their professor (who is already on the mat and have been rolling with other students);
This is just a simple sign of respect to the gym, students, instructors(old school but still an easy thing to do).
- forgetting to bow in and out when walking on/off the mats;
Same as above.
- not facing the wall when retying their belt;
Giving way to everyone should be a thing. Sure you have a higher belt, but if you invade my space that's on you.
- not giving right of way to a pair of higher belts when rolling - even when the two lower belts stayed in the same spot and it was the higher belts that were moving around;
Paying to grade or get promoted is a joke. I already pay 100+ a month to train at the gym and you are going to add on another 100 a year or so.....
- refusing to be graded for a stripe after learning that each grading for a stripe cost $50;
Same as above. Would find another gym if I was excluded.
- getting angry at being locked out of more advanced classes not because the guy didn't have the skill (the coach even said he did) but because he hadn't paid for grading;
This depends on how long of an extended vacation. It is a weird thing to promote someone else.
- wanting to wear a new rank they got while training overseas on an extended vacation;
Wristlocks within reason are fine. Kind of lame to do to whitebelts who haven't learned to defend them yet.
- tapping someone out via wrist locks;
Match how the upper belts/professors are rolling. They go for subs, you go for subs. Had a bigger black belt get high mount and stay there to have me work out of it. Seems fair if the rolls were reversed it wouldn't be a big deal.
- (my personal favourite) apparently its also disrespectful to tap your professor out or to hold him in a dominant position (in my friend's case, he was asked what point he was trying to prove and didn't he realise the professor "let" him get the back in the first place - my friend easily has 50lb on the professor and is a well seasoned brown belt).