Even if it's not (I don't think it is either) - I agree with what Foxvint said upthread - she's very au fait with Twitter, obviously searches her name 24 hrs a day, and should be making an effort to distance herself from people like this, given her current lack of any kind of positive media profile. A brief tweet "This person does not speak for me, I do not condone this type of language or harassment and I ask that they desist" would do wonders for her image. Too lazy though and let's be honest, she's probably enjoying it, even if they are a fake.