If this posts are on trending is because the people on steemit likes it, that's the way it works, If you don't like it just scroll down. Steemit is full of worthless information and stealed content, I don't like to see that either, but I just scroll down, If @heajin's post gets too many upvotes is because people like me appreciate the good quality of his content. If you want to donwvote someone for bad quality content start for those who stole articles from the web or post porn, or simply replied to post for a follow or an upvote. We are learning with him, if you don't want to learn just srcoll down.