I dont know what system Blizzard uses, but i can guess the flaw of "gathered reports".
And what i mean by that is, despite me gathering thousand of reports 3-4 years ago at Dota 2 (Yes i am toxic because people are mega bad there too) nowdays even while being 2 years offline averagely because it messes with my anger when i play that game, even the report of "Can we get wards please?" when asking the supports, triggers the auto-punishment system (Low priority).
I can guess because my account is flagged as "disturbing".
I can guess Blizzard system is the same without a "cleansing" "reset" option.