It looks like a straight forward action to delete this posts. You didn't share the threads that were moved, but this should have been acted on.
Call it a tantrum, an inadequate reaction, or whatever you want, but after such a VOMIT MODERATION, I dont want to do anything else here. Keep collecting garbage further, creating the illusion of moderation. That's all I wanted to say.
Do not worry about your accuracy too much; one accurate report is worth many inaccurate reports.Adequately handled reports are a motivation to report more, but we would try to focus on the action and not the result.
If in thousands of reports you've only had a handful of issues, doesn't seem like a reason to quite sending out reports.