I'm sure most people are quite aware or in their own lives to notice. YouTube has decided that it'll 'remove' dislikes to some degree. They don't work like they use to. They are hiding dislikes now, making it look like you are only disliking it. The reason? Dislike mobs disliking all their sponsored product based ad and news media content that no one wants to see. I wish I was kidding. That's their excuse for now effectively trying to make you look like the bad guy for disliking a video.