In fairness things like pitch tracks and replays would make it hard for there to be much of a bias, as it would be pretty damn evident. (aside from playoff starting times that is) There's no mechanical system to determine if a foul is really a foul, or a non-call should have been in the NBA. I mean we can certainly SEE the bias (I think more towards superstars than towards a team in general), but there's no concrete evidence we can really point to. Number of fouls doesn't tell the whole story as to whether they were deserved or not.