Procedural compliance ,I'd let the RO handle it,unless the RO is distracted,negligent,busy,or just looking the wrong way
Everybody is responsible for safety all the time.Adbdicating safety to the RO is not so different from abdicating self protection to the police.
I won't worry about your bag of Doritoes,but if you are trying to clear a stuck round from a chamber and the muzzle is pointed at someone's head'I don't care if it is my first visit to the range,I will step up.I'll let the RO handle the action to be taken,but I will intervene.
If your kid crosses the line of fire,I will bellow cease fire,not look for an RO.
No disrespect to RO's.I thank them all.