Not wanting to seem too bold.
All landings and takeoffs conducted in accordance with the flight manual actually STOL.
Or the expression should be maximum performance. An aircraft crossing the threshold at 50' at Vref (Vat) and touching down at the correct spot is what the AFM states. Likewise the T/O is always measured from Static thrust to 50' (35') after t/o.
The casual approach to a rolling start and touching down at the end of the runway are not IAW the flight manual and therefore may be held against the PIC in the following investigation.
I was always taught and teach the position of touchdown should be accurate off a 50' crossing height - if the end of the RWY is used to touchdown then the strip is far too short for the operation.