Where did these bureaucratic ideas come from that you can't criticize a referee's performance. They are in a paid position, if you receive a check for referring a game (and high school is $100 at some schools) then you owe it to every person there to not only give your best, but know and understand soccer. What world do you live in where you receive payment for something, and are above criticism. If you suck, and you come and collect money, everyone deserves to tell you, that you suck in hopes that you either get better or stop coming altogether. Its called "skin in the game", as well as its time proven by the "Lindy Effect".