With you Foxmoth, don't believe that it does apply.
Many of the aerobatic machines that I know have the stall warner C/B out and disabled (taped over) so that it can't inadvertently be selected on and therefore give the poor stick-Ninja the fright of his life!
On my own mount, the audio feed is insufficiently loud to be heard above cruise power, so for take-off it is pretty useless and for landing - it scares me to bits! So the non-cycle type C/B has been changed to the selectable one. With pax, I always have it ON as their weight does make quite a difference!
One young lady recently asked after we'd landed what that siren noise was? I told it her that it was the aeroplane's lie detector. She wanted to know; what was lying? You were, it doesn't believe that you are only eight and a half stone!
Stik