No. The best thing to do is quickly skim through the video and close it as soon as possible. No rating, no commenting, possibly even skimming quickly enough that youtube doesn't even count it as a real "view".  Thumbs down or up doesn't matter for youtube's recommendation and "what's hot" algorithm, both count as a rating. This is the reason why dumbass and/or troll comments are always on top, because ratings (positive and negative) and more comments (positive and negative) mean more viewer interaction/engagement, which in turn means more probability of gathering more ad views. Spend as little time as possible on the video and leave no kind of feedback and youtube might at some point notice a lack of viewer interaction and deem the video too uninteresting to recommend to others, which is worse for the creator than having it recommended to many others because it's so controversial and full of comments.