A Hoon is usually associated with "bogan" type guys, metal listeners or black jeans and mullets who spend all day playing with cars, V8s. Usually around 20-35+ years in age. Some are crazy others are petrol heads but the majority are both. I guess I'm a kind of a hoon, I often depart from outside my house leaving small black marks. Rev my cars up for a while when warming them up or just for the hell of it. The next door neighbours aren't car people and they would probably be annoyed thinking to themselves, "He's at it again.......BLOODY HOON!"
Hope that helps.....just think of a Hoon as a modern day Mad Max I guess.