Wanna bet the only ones saying to roll the lines are the parents of kids who would not play on the PP PK or last two mins of a close game ???
Try to find one set of parents that doesn't think their kid should be out there on the PP and PK. You would have better luck finding the pot of gold at the end of the rainbow. I've seen plenty of angry parents and shouting matches with coaches when junior is on the bench during "crunch time". Even if everybody knows that junior is the 13th player in the roster. Good luck on your search.
Coaches put out who is best at the right times to win the game, not to please parents. If you think your kids should be out and he is not it because your head is in the clouds and not reality. Our coach is up front with parents regarding playing time. There is no BS. If you ask why your kid isn't out or was skipped he tells you exactly why. He rarely shortens the bench but when he does there is a good reason. He tells the parents at the beginning of the season..he is in charge, he makes the decisions and if you don't like it leave. It really cuts down on a lot of problems. No one yells to the coach from the stands for any reason...good way to get your kid bench even if he is one the top kids.