from what i remember, these "band" shirts have been around since the 70's ... and yes, teenagers mostly wear them ... so what .. all teenagers want to be cool and fit in .. this what teenage life is all about.No different, except like I said, wearing band shirts has become an anti-trend and an image that teenies have adopted to "be different", so to me, it's become cliched.
personally I think I wore metal shirts almost daily from 1984 to 1990 ... no kidding.
If i show you guys a pic of me in those days and of me now ... you guys would freak.
actually this brings up another point, going back to another thread ... one of the reasons for metal not being so popular nowadays might be the fact of these non-metal looking fans. the shirts and the patches and the MC jacket were all part of spreading the word of metal and bands you liked. we were like walking Billboards .. hehe
PS: and yes .. metal has to be in your blood