The car club that I belong to used to hold a "invitational only" 3 day indoor car show every year. Car club members were trained in the fine art of judging cars and every car was judged at least twice before an award was decided. This was done to reduce the chance of favoritism. All members cars were ineligile for any judging award and we knew this going in. We paid the same entry fee, but were ineligible for awards.

Even with those precautions set up, there was always someone who thought they should have gotten an award instead of someone else. You could even show them why their cars didn't receive a higher score, but that really never made them cool off. Some had to be evicted from the show and told they would not be allowed back in the future.

I judged for 3 years. Instead of sitting back and enjoying the show, we (usually 6 teams of 2 judges each) had to judge and re-judge 350 cars in about 12 hours. Since once the cars were parked on Friday they couldn't be moved until Sunday afternoon, we tried to do as much judging as possible on Friday and Saturday after hours when the car owners were gone. Good judging is a lot of work, I don't envy those who do it carefully and with out prejudice. It was fun, but it could be stressful depending on the car owner and their attitude.