I wouldn't - it wouldn't be fair - because I would ascribe the negative comments to individuals - probably the wrong students (we tend to blame the people we dislike most and or whom we think dislike us most) - and even though I would be aware that I might be blaming the wrong students - I would be unable to not feel a tad negative towards the suspects - and that would affect my scoring of their tests - not necessarily that I would give low scores - I might give high scores to convince myself that I was above such petty retaliation.