I am a firm believer that you cannot please everyone and if you are busy trying to you may lose your soul. I am all for negative comments and constructive criticism as it makes us stronger. I personally try to avoid the practice of criticism and steer towards constructive encouragement.
I don't believe that bullying, yelling, swearing, throwing plates on the floor, complaining that sashimi is raw, complaining spring dishes are like summer dishes and trying to be Gordon Ramsay would make people better.