I am not part of Hive Watchers, and I have spent the majority of my time on Steem/Hive identifying and stopping abuse but I recently step down to leave it to those who care to do it.

While I agree those who cover up and hide criminals are guilty as well (to some extent), it is up to the community to step in if someone is voting in a way that harms the platform, yet very few do. In terms of curation sniping, there is very little you can do as flagging their votes just flags an innocent third party and the majority of stake holders here are just curation sniping. Many doing it with as little vote as they can to get maximum rewards rather than sincerely supporting people.

To answer your question, there really isn't much that can be done. The majority of stake is not voting based on quality.

The next hard fork will include a mechanism to reduce the effectiveness of curation sniping to some extent™.

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