There was an incident ~10-12 years ago, where the AP site would randomly spit out the names of other members and their account balances when someone made a points balance inquiry. AC dealt with it at the time by sending everyone affected a letter informing them of such, and 5,000 free AP points.

As for the title of this thread, I thought it had to do with how loyalty programs like AP have been constantly hacked and slashed in terms of their usefulness and rewards offered. For instance, the latest "enhancement" to AP appears to be that bookings are made in "Tango", not "Flex", and hence seat selection is no longer complimentary. The next shoe to drop? Probably stopover privileges, IMHO. Sooner or later, confirmed reservations may go the way of the dodo bird with the way that AP is going, and an AP booking will be a standby booking at best, just like employees use for personal pass travel.