As well as threats online, people were turning up to Rouxle Le Roux's home and yelling the death threats outside her house.
Nathan Kraatskow, 15, died when learner driver, Le Roux, hit him at an Albany intersection on May 18.
Le Roux, 19, had drunk wine and smoked cannabis earlier in the day before her Mercedes crashed into Nathan when he crossed an intersection riding a small bike.
Le Roux and her two passengers failed to stop.
She was sentenced to 11 months home detention and 250 hours of community work for dangerous driving causing death, sparking a public backlash and the family taking a petition with 143,000 to Parliament yesterday.
On Saturday, Nathan's mother Charlene Kraatskow started the petition questioning the New Zealand justice system and calling on prosecutors to appeal Le Roux's sentence and seek a harsher penalty.
However, yesterday Le Roux's lawyer Belinda Sellers QC said people were outside her client's home on Saturday night "screaming that they want to kill her".
"She has been too afraid too sleep. It has been really frightening for her."
