Can't give you a 100% convincing answer to that one. But...
- R2160 seats and harnasses are not really designed for parachutes
- We don't have them anyway
- I don't know if the canopy is suitable for in-flight jettisoning. There's nothing in the POH on this either. The handles you see are mostly for loosing the canopy attachments in case of a landing mishap which distorts the engine cowling, so the canopy can no longer slide forwards
- We use significant lower club margins (-1/+4 g) for aerobatics than the manufacturers limits.
- The R2160 has very docile spin characteristics. You've really got to work to make them "snappy" (competition-grade).
But having said that, if we would have parachutes and the appropriate training/procedures for them in place, I'd probably wear them. Not because of a spinning mishap but for an overstress of the airframe.
And the wow-factor obviously. Jumping into an aircraft with a flight suit and a parachute, plus the right set of shades and one of these cloth helmets to keep your headset in place, projects a totally different image than jeans and a shirt (which is my normal attire, even for aeros).