Facebook is testing a feature that lets users register a negative reaction to comments on the social network platform but the “Downvote” button is not a “Dislike” button.
Facebook executives in the past have expressed reluctance with rolling out anything resembling a Dislike button.when someone Downvotes a comment, the comments aren’t shown as downranked, or lowered in comment ranking. Facebook is once again making it abundantly clear that this is not a “dislike button”
The idea here, being that Facebook can track these reports and flag posts and even users accordingly.