Just a bit of humour, no need to get upset . We all know how expensive track days can be. I do believe however, that considering the amount of money we spend of our cars, it is wise to invest a bit of money on something that is going to protect your head.
For those hiring helmets, be aware that they are limited and although they have quite a few they are all different sizes. So if there are a lot of people with the same size head you may have to settle for an ill fitting helmet.