Do you want him to be able to *hear* later one - like for the rest of his life?
I can't pretend to know what dBa levels are current in '02 but.. I Know that the message about permanent ear-damage is unwelcome to hear by fans: so they don't listen to that message. [no pun intended]. With the right kind of small protectors you CAN hear "the music" (quite well, especially when it IS already at lethal volume). Pretty cheap insurace IMhO, but especially for young'uns...
Anytime your ears ring, even a little - after you leave: you DID at least some permanent damage to the cilia. They don't grow back. Same deal for shooters: just ONE super-loud report will do and, it integrates over a lifetime.
FWIW
Ashton