If I'm not successful in having statements of alleged death removed from Kip Noll (Q390033), then I wonder how much I shall continue contributing to Wikidata.

Oh... downgrading the statements to "deprecated rank" must have caused the infobox transcluding Wikidata entry to no longer display the "deprecated rank" statements. However, the statements are still at the Wikidata entry, but at least other projects don't display "deprecated" statements at this time.