some track days see it this way, others do not... that's why you always have to read the supp regs
SS8: they don't really flex at speed, even the cheapish one I had was fine... I put pins in it for a couple of reasons, one was to help it line up and sit flush, two was for extra insurance and three was because they look cool lol
I had the crappy sparco pins that as Jack mentioned get in the way when your cleaning the car and collect dirt etc... aerocatch flush ones are much better IMO