Dislikes/Downvotes are a terrible concept. They just serve as a way for people to hide posts they don't like. Downvotes also come with negative connotations so upon seeing a post and observing many downvotes, they may just not click it and assume it's trash. On forums that have them (i.e. Reddit), botting downvotes is so fucking easy that the truth may be buried while false shit forever circulates.