One very negative effect of platforms like Reddit and hackernews is that downvotes and upvotes system exacerbates groupthink and opinions contrary to the ones o

One very negative effect of platforms like Reddit and hackernews is that downvotes and upvotes system exacerbates groupthink and opinions contrary to the ones of the people reading your post at a given time. Lots of posts could easily get upvoted or downvoted based on circumstance and dissenting opinions shut down.