I don't have the name(s) off the top of my head, but can't you do a query of users whose account age are greater than (some threshold) but whose median comment score /amount of flagged to death comments is past some other threshold.
Mathematical quality scoring doesn’t work well for moderation of human behaviour in a community. Context matters a lot. Feelings influence people’s conduct and perception of others’ conduct a great deal. A user may get huge numbers of upvotes for comments they make about a technology or their profession, but then attract many downvotes and flags when they're commenting about politics. This is particularly true when political topics involve war or other life/death matters (which is a major reason why those kinds of topics are difficult on HN – they can bring out the worst in otherwise very positive contributors).
Sheesh. I meant that as a step 1 to get a list of suspect users, and then you read the users comments to see if they're all breaking the rules. (The same thing you'd do if you get a report of a user being "moronic" over email)
tomhow|3 days ago
netsharc|2 days ago