I'm going to assume this fan is 13 and has no idea about the realities of domestic abuse.
She was a fan of Cori Falls's fics. The former is debatable, but the latter is certain.

Also, part of the reason Cori hates the "Tracey Gets Bugged" episode is because it reminded her of when she was made fun of for having her red hair cut short and a fic she had the misfortune of reading where Jessie had her hair cut off by Cassidy while Butch raped her. ...No comment.
In all fairness, Miss Falls was clearly not all right in the head. I'm willing to believe that the memories genuinely triggered her. Doesn't excuse the way she dealt with it, but the underlying issues are probably legitimate.