All the AP from repeatable pvp quests should have been reset as soon as the exploit was discovered and a hot fix for faction population balancing put in place. It's not enough just to cap the population for each faction. Kill assists existed in Beta and it was just ridiculous - it's not like this was a big surprise. WoW battlegrounds had the same issue until Blizzard changed the system. I don't ever want to see a player being crowned emperor because they were the best quest repeater / suicide king!