The Ozzman. The Dark Lord of Heavy Metal himself, back when he truly was Satan's son and not a sad old reality TV star who made TV adverts; Ozzy, somewhat ironically, sold his soul to Corporate America rather than Satan.
Anyway, in the '80s, Ozzy was dangerous and being a fan made you dangerous. He was the known face of Metal, the man whose albums could get you labelled as a delinquent, the man who bit the heads off all sorts of things (varying from a bat, via a chicken, to a cow in one version of the myth) and the man who caused US teenagers to shoot themselves, according to the popular newspapers.
Wearing a T shirt depicting Ozzy (or any of his contemporaries) meant that people avoided you on busses and gave you nervous sideways glances in the supermarket. And when you're 15, that kind of notoriety is priceless.