This is from EmeraldCLovegood : "I called my friend Hermione one time because her hair was all frizzy. My other friend, who is also a Potterhead, made a joke about me being Bellatrix because my hair is frizzier than Hermione's at times."

Let's face it. I'm sure all of us Potterheads have called our friends Hermione or Weasleys we just do. That's our way of life. I've never called anyone Bellatrix though, except Delphi.... and a crazy government official... Comment your Potterhead problems!