As a rider/racer, my vote would be "Absolutely not". Rider safety has to be the primary consideration here.
Perhaps you say you are responsible enough to not come too close to riders on track ... but there is no way to distinguish you, or your drone, from anyone else's. And if your drone has a technical malfunction that causes it to come down on track when someone is approaching it at 100+ mph ... or an operator error that has the same result ... I am pretty sure a rider hitting a drone at that speed at head level would be a fatality. It is NOT worth the risk.
My understanding - from having spoken directly to riders involved! - is that during the recent filming of the "Motorcycle Mayhem" series, there were some uncomfortably close calls with drones that were used during filming, and that was with so-called professional operators who said they wouldn't operate over the track surface or too close to it ... and proceeded to do just that.
CTMP (Mosport) does not allow drone operation on the property during track events. It is possible that exceptions might be made in specific circumstances but if there is general public involved, and general ("public") participants on the track, there is no way they should be allowing this risk.