Birgit Sattler, a microbiologist from the University of Innsbruck, Austria, highlights the need to raise awareness of these issues.

CNN: Antarctica: On thin ice

In Germany a senior detective specialising in cybercrime in Frankfurt am Main, Birgit Roth, says that internet harassment is present in some 40% of stalking cases that her force investigates.

ECONOMIST: The internet allows the malicious to menace their victims