Our college team was scheduled to leave at 7:30 AM. All players needed to be in the bus before 7:30 AM. We had a rule that clearly stated, anyone late for the bus without an excuse would be left at home. One of our very best players was not on the bus at 7:30, we saw him walking down the sidewalk towards the bus. I had the driver open the door and told the player he was late. He said, sorry coach I didn't wake up in time. I told the bus driver to close the door and take off. We left him at home.
A couple of our players complained saying we should have let him on the bus. Maybe we should have, but we never had a player ever again be late for the bus. The player we left behind that day is now a good friend and very successful businessman. He told me that his teammates talked to him when we returned that night, telling him how unfair they thought this was. He told them he was kind of pissed off, but he will never be late for the bus again. He never was! There was no more discipline handed out. We won a double header that day without him. The next year he was our captain.
The rule and the penalty were spelled out ahead of time.
Ryan Mallett should hear this story. 
When did the others complain? It's not a democracy. If before bus left I would have asked " Who wants to join him"?
sons coach did same thing to player on his team. No one dared say a word to coach, they all knew he meant business and no one was ever late again.