All the abuse cases you showed in your article, are a real danger. Already in 2016 on the Steem, there have been a lot of so called curators, guiding most of the whale votes into their own pockets. As I know today, 4 years later, the people really doesn't become much more better in character. But they are much more experienced in cheating the communities. We should pay a lot of attention what all these curators are doing. And in my opinion all the controlling work is not worth the positive effects this curation trails have.