You'll notice then that I turned the answer round by asking another question - "what are you trying to achieve?" rather than offering prescriptive 'do this / don't do that' advice.
It's entirely possible to guide riders to make the right decisions in the traffic situations they encounter so that they satisfy the examiner on the day without laying down rules... and the fact is, 90% of the skills we use on a daily basis ARE the ones we learned 'to pass the test' - so whether you appreciate it or not, you are teaching skills for life!As Horse said, what we would like to think examiners "might" take into account/understand and what they actually apply on the day of Mod 2 test might vary greatly. I even questioned one of the higher ups at the new place in Manchester where all the instructors are assessed as to how "cornering" should be delivered in order to comply with what examiners want as the guidance in their own literature and what examiners want appears to differ. The reply was to teach the pupils what will keep the examiners happy so thats what i do.
As for the oddball requirements, I took several thousand candidates to test over the years I was a basic trainer and whilst there were odd 'foibles' that some examiners had that caused me the odd raised eyebrow, I can genuinely say that at the dozen or so test centres I used with different schools I only encountered one examiner who was off the charts for weird requirements and random fails, and who I genuinely had to warn trainees about.
And I believe he retired in 1996!