Well I read it with my own eyes, probably someone you're defending while grouping me in with people who overdownvote in your post.
It doesn't sound like rocketscience to build a tool that notifies people when big downvotes occur late while filtering out hivewatchers or anti-abuse accounts like that so many can go and decide for themselves if they want to collectively counter said downvote and share the loss of ROI from that vote with each other until it's back to a realistic/fair reward.