Unfortunately, the opinion of the "reasonable person" has been very clearly and deliberately left out of the operation and interpretation of the Regs because everything is proscribed in terms of a strict liability offence.
The reasonable person was nowhere to be found when CASA prosecuted John Quadrio.
The reading of CASA's interpretation of aerobatic in the court case is chilling. And its determination that John was performing aerobatic manoevres based on edited iPhone video from a person that the court described as an "unreliable witness" is bewildering.
There are many posts regarding John's case. Anyone not familiar should google it. If CASA's behavior toward John is repeated towards an instructor teaching stalls, then the concerns of ixixly and others would be very real.
This is why the detail of the regulations is important.