Talking to coaches, I've often heard them point to a disparity in the number of fouls called against each team as a sign of bias or incompetence of the officials. I guess their point is that in a game where there is a lot of banging going on, one team cannot be entirely responsible for all of it.
In a well-officiated game, should each team have a relatively equal number of fouls? Not exactly the same, but within a certain "acceptable" range?
Is that part of the evaluation for officials?
Or is it a matter of if one team has disproportionately more fouls called against it, it really did commit more fouls?