I always wonder why the management needs to deal with this. I believe in state run services of which one is the police. If someone threats you, go to the police (and then with proper procedures the company needs to be forced to help prosecution E.g. by a judge). I do understand the police is reluctant to do something (at least here in Germany, "Die Polizei ist nicht im Internet, oh wei oh wei!"), but privaticing crime management is not the future. And I did go to the police several times because of things that happened "on the internet" and was helped.