Agreed. The chances of a shell being knocked off course by hitting the drone and flying over to the bank to explode in the crowd are also somewhere between slim and none, which is why I can't get excited about it in this case.
But a different show where the crowd isn't quite so far away? With maybe 7 or 8 or 10 or 12 drones flying around in the (cue Archer) Danger Zone? And the possibility of some immature moron thinking how "cool" it would be if the drone actually did get hit?
Risk management will tell you that even extremely unlikely events need to be taken into consideration when they 1) can be easily avoided and 2) have the potential for disastrously bad consequences, such as the maiming or death of an innocent bystander .
I don't see this ending well for people who like to fly drones