When I read comments, I see basically three levels: 0 - one person disagreed - possibly an anomalous bad comment -1 - two people disagreed - confirmed bad com

When I read comments, I see basically three levels: 0 - one person disagreed - possibly an anomalous bad comment -1 - two people disagreed - confirmed bad comment -more - a trolling comment where the writer was baiting downvoters Doesn't always work but I'd definitely lose information if there was a floor of 0.