A trail is not a substitute but it is something. More users could follow your trail. However, Oleh is right too, downvotes can quickly turn into an ugly war which could end up being unfair to innocent people who put real effort to get few rewards but wish to see an abuse-free environment. We need something more unanimous or universal like steemcleaners as you said.
I wonder what happened to Abuse Watcher? I still see it sometimes but from the beginning I couldn't believe fully in its authenticity. I'm not sure why.
The Steem Watchers is still going. They've got quite an extensive blacklist that they downvote but it's all low-level petty crime. It might just be that I've never noticed it but I see very little in the way of booming abuse or steemcurator accounts being investigated - unless it's a follow-up post for something I've looked into.
Downvoting a post can decrease pending rewards and make it less visible. Common reasons:
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