Nobody is giving anybody permission any more than anyone else though. Account 6 creates a family and 5 accounts with a game join the family. There are now 5 copies of the game in the family pool. Account 6 can play and get banned. In this situation nobody even invited account 6 to the family.
Thanks, that explains it. So there is a pop-up when you try to play a game from the common pool and you have to choose who you are borrowing from?