I used to teach college before I entered the corporate world. My brief-ish time teaching taught me that student evaluations, as a whole, were not only worthless but less than worthless. In theory, they are a great idea. In reality they are manipulated easily and not by conscious direction. Math, for example...the best evaluations of the entire department barely reached the average of the college as a whole. Why? People don't like math and the math department is forced to teach classes required by other departments (looking at you Business college) and the students can only blame YOU for their forcing them to take such disgusting stuff they hate. Besides that, we showed that the evaluation was 98% correlated with grade given. 98%. Look at that again.... 98%! Therefore, easy graders were regarded as the best teachers by the college. Guess what happened. There essentially was no difference between grade given and your evaluations. Therefore, teachers were in full control of getting whatever evaluation they desired by the grades they assigned. Now players are not students and they are fully capable of grading their referees/DMs but I can't help but wonder if some sort of distortion would happen as with teachers above. It won't be the same...but you never know what will distort. Even if players gave fully accurate evaluations with a scale score then what? A DM gets a score average of 3 out of 5 for his last few games. How does that help? He will probably just give up and the last thing we need is less referees/DMs. What I would like to see is a culture of feedback where players WRITE a short message to their referee/DM where they say what they liked and where they say they would like changed/improved. I know this advice would be much more helpful to me.