So, when you block an instance as a mastodon administrator, on account of that instance spewing spam like mad and also none of your users following anybody there, this will NOT resolve any of the >100 reports your users have openend against that instance, despite the reports now being useless.
And of course, Mastodon still has no bulk editing of reports, so you die the death of a thousand ~~papercuts~~ report-clicks … or you just add report-resolving to your management script: