my own personal findings- -most will only use excellent or great or none at all -by disabling it, it gives the viewer one less thing for them to do, as their comments are more important to me -occasionally have been used to "troll"... leaving a glowing comment with a [Hmmm] ranking to try & bring it down in the top 100 [Best Rankings] -after awhile i have found them useless & embarrassing :]