In one noted case in 2011, actress Patricia Arquette quit Facebook after alleged cyberstalking.
In her last post, Arquette explained that her security warned her Facebook friends to never accept friend requests from people they do not actually know.
Cyberstalking of intimate partners is the online harassment of a current or former romantic partner.
It is a form of domestic violence, and experts say its purpose is to control the victim in order to encourage social isolation and create dependency.
According to a study by Kowalksi, of 3,700 bullied middle-school students, a quarter had been subjected to a form of harassment online.