Why should Beehaw get a report for something not done on their instance? Instance rules only apply to that instance activities.
Spammers have been a bit of an issue recently, and federated reports would help them get removed quicker I think
That is fundamentally anti federation suggestion
True to some extent IMO. The HB instance does this on their announcements/meta community, so apparently it might be possible unless HB added that feature into their codebase themselves