You're a little late man, I already went over the fasting the fish before shipping topic. I usually try to call ahead to make sure they fast my fish before they ship. I also stated that its unfortunate that customers would rather rush their fish rather then wait a few days to have it fasted to avoid burns. Anyway, how many of the dozens you had shipped were piranha and what size?
You shouldn't have to ask to have your fish purged as its standard operating procedure for virtually all shippers.