Mad Jock ........ Unreasonable !
Jock I think you are unreasonable being critical of people who are turning onto final at 800 ft while deploying flap with the aim to be full flap speed stable at 500ft as they roll the wings level...........it's what I do all the time at small airfields.
Aircraft type Boeing 737-800, typical threshold speed 145 KTS.
I think a C152 or PA28 being flown this way is likely to be in the hands of a budding child of the magenta line !
FLY THE AIRCRAFT you are flying NOT the aircraft you aspire to FLY !