Why do emo people wear wristbands?

They wear them so people wont see their scars from cutting themselves. Also we wear things that help to show that we are not going to listen to the preps and their beliefs because they don't accept us for what we all are. You know, typically, it's not the Emo's that cut themselves, it's the posers and wannabes, and the posers that cut themselves, well, most usually show people their scars to prove that they're 'emo' when their only hurting themselves to prove what there not. Now, to answer the question.

It's not only Emo's that wear wristbands, preps, jocks, scenesters, even the goths wear wristbands. It's not just one stereotype that wears the same types of clothes and accessories, preps even wear skinny jeans and hair bows every once in a while, and that doesn't necessarily make them scene or emo, it makes them who they want to be.

The wristbands we all wear are just different, some are pink, some have something relating to emo written on it, like, I wear Brokencyde and Blood on the Dance floor bracelets, but that's because i love those bands.

And one more thing, I doubt anybody fears a stereotype, why would preps fear us; and why would scenesters, emos or goths fear them?