so hard to answer, it depends on the situation. Is it repetitive? Was it real or a bad call? Keeping intensity, a coach would know most of the time if something is intentionally cheap or not I hope. I imagine depth would play on how free a coach would be to pull a player to cool off.
Yesterday we got stuck with that personal foul facemask on the D that extended an army drive, on the replay it was clear it was not. The call I guess worked out because of the Pick we had a play or two later.
I liked @ipd054 answer.