Leave them to it to be honest, if they want to walk around exactly like each other, in another form of a chav type culture with not so different ethics leave them to it.
To us its obvious between a chav and an emo. But older people its not as easy to tell. They just see a kid with a hoodie on, his hood up, piercings, looking expressionless. Little hard to tell the difference at times for them, same with trucker caps, they are still a cap, caps make you almost instantly fall under chav.
You are NOT what you wear, wearing tight jeans and a dodgy hair cut is fine, but it wont change your attitude or make more people like talking to you any the more to be honest. It might introduce you to more people of the same interests but your still the same. Get over it, leave people be ffs.