Am I the only one who thinks that if so many people are fainting, perhaps they're doing something wrong? I fail to see why this should be normal.
How else are so many recruits going to pick up the nickname "Timber"? We had one go down in a 30 minute parade, inside, during the winter, with about 14 people. If you aren't used to parading then it comes as a shock to the system.
Play the numbers game and with >500 on parade some will always go down.