It is frequently the case that people use the external name provider to bring in names that belong under locked taxa (mammals, birds, etc.). These end up ungrafted and often require significant curation effort. It would be really helpful for curators if we could ask the external name provider for ancestors of potential imports and prevent names that are descendants of iNat locked taxa. I think a best case scenario would give an error message directing people to instead use flags.
Brief discussion here: https://forum.inaturalist.org/t/locked-taxa-and-search-external-name-providers/10147