I must be the only one who finds this less egregious than the prevailing lemming-like method of rating games in general. It seems many people have already formed their opinion before ever putting their fingers on the flipper buttons.
Those enamored with the thought of playing a highly rated pin will inevitably rate it artificially high. Those that have read negative things about a pin will carry that bias with them during their first (and probably only) play and subsequent rating.
Tracy