A not mean workaround - which I use - is to pull up their obs from a recent batch - skim and Mark as Reviewed.
Presuming that Not ALL of their obs are unwanted?
PS I will not zoom and scan across a landscape shot. If the observer ‘wants’ an ID, they need to bring info in the picture which is reasonably identifiable.
There are a string of forum threads. Will list a few
https://forum.inaturalist.org/t/make-opting-out-of-community-id-unavailable-to-new-users/38192
https://forum.inaturalist.org/t/should-we-change-the-way-opt-out-observations-are-treated/18821
https://forum.inaturalist.org/t/how-to-deal-with-wrong-id-opt-out-of-community-id-no-interest-in-changing-id/40555
https://forum.inaturalist.org/t/opting-out-of-community-taxon/38062 264 comments
https://forum.inaturalist.org/t/question-re-opt-out-of-community-id-and-computer-vision/18055
https://forum.inaturalist.org/t/user-has-opted-out-of-community-taxon-identify/6715
https://forum.inaturalist.org/t/needs-id-but-has-opted-out-of-community-taxon/4462 mine in 2019. Not a new issue.