Wiktionary
cyberstalker
n. (context Internet English) A stalker who operates online.
Wikipedia
Cyberstalker (film)
Cyberstalker (a.k.a. Offline) is a 2012 Lifetime television thriller directed by Curtis Crawford and starring Mischa Barton. Barton stars as a young artist living in seclusion since her parents were murdered by her stalker thirteen years earlier; her peace is suddenly disturbed by his reappearance. On 10 July 2012, a trailer was released. It was televised in the United States on 14 September 2012.