I've just received my first threatening email, should I consider myself one of the 'gang' now?

Oh dear. There are some people in this world. Welcome to the Club, Dearest, and even the most polite of us can get hate-mail (eek). Well done sending it on to the Y!A Gods for prompt action and keep a copy for yourself. Just make certain none of your vital information is visable on any of your Yahoo accts, even the original one.