Sorry bout that, link fixed.
A couple idea threads to pursue in response to your follow ups: Have you seen dbzero's Fediseer? Also, automated community moderation to automatically block users that comment more combatively across other communities and unblock once they establish a pattern of being less so, has been tried on a political news community on lemm.ee before, but lemm.ee is gone now for unrelated reasons. I just wonder if that underlying project is still available and in use somewhere. I don't currently have the energy to look it up.