At a minimum PS needed to be limited to your base (or out of base pickup) and the general vicinity of your home. No PS to/from Europe/SA/Asia at the start of end of your rotation when you live in Tulsa. Have a system where if you're visiting your parents or whoever in XYZ city you can request PS on a one-off exception not to/from your home. That policy alone would have cut down on a lot of the actual abuse of PS. Using PS during the day between lean overs isn't abuse in my mind. It is heavy useage, but not abuse. Going to Rome at the end of a 4-day is abuse.