No fucking way.
If the ro is where he's supposed to be (ie always uprange of the shooter) it's impossible for the shooter to sweep him without also breaching the 180. That's a dq.
If the ro fucks up and gets inside the 180 OR fails to move out of the way of a retreating shooter then he should call STOP as soon as it's clear he's either impeding the shooter, about to impede the shooter or about to be swept. If he's slow on the call and gets swept that's on the RO not on the competitor. Providing as I said the competitor is not breaching 180 or some other rule.
The competitor is NOT responsible for the actions or inactions of the RO. Those are beyond his control by definition.
If a competitor is retreating and the RO can't keep up and out of the way, it's on the RO to call STOP just as BB says here. Any sweeping that occurred during such an incident would have to be handled on a case by case basis.
The salient question here does hinge on the 180.
If the RO is swept uprange of the 180: DQ per several
If the RO is swept without the 180 being broken: no DQ, that's on the RO - he's out of position and that's a reshoot.
Unload and Show Clear...
"Licorne" French Polynesia 1970
It pins my irony meter when people post things like "your to stupid..."
You brought a rifle to a handgun competition?