Yeah...it couldnt possibly be all the rock concerts he played...its DEFINITELY the headphones.
I have no doubt that I have hearing damage (I actually have tinnitus, which for those who dont know is a constant ringing in the ears...it only really bothers me when things are silent) but I dont believe its from headphones...if anything, its from the concerts I've gone to, the movies I've seen, and the heart thumping sound coming out of my car stereo.
They should be warning us about car audio before warning us about the use of headphones, because I think that most of the time thats a million times worse...