After testing earlier in 2021, YouTube removed public display of dislike counts on videos in November 2021, citing its internal research that found users often used the dislike feature as a form of cyberbullying and brigading. While some users praised the move as a way to discourage trolls, others felt that hiding dislikes would make it harder for viewers to recognise clickbait or unhelpful videos, and that other features already existed for creators to limit bullying. Some theorised the removal of dislikes was influenced by YouTube Rewind 2018, which was universally panned and became the most-disliked video on the platform. YouTube co-founder Jawed Karim referred to the update as "a stupid idea", and that the reason behind the change was "not a good one, and not one that will be publicly disclosed." Karim felt that the ability for users on a social platform to identity bad content was essential, saying, "The process works, and there’s a name for it: the wisdom of the crowds. The process breaks when the platform interferes with it. Then, the platform invariably declines."