girlfriend being harassed, what to do?

[NT!]

the only thing you should do in this situation is pick up the phone and say, "i know your name, address, phone number and place of work. if you ever attempt to make contact with us again in any way, we will call the police and press charges. is that clear?"

she should not call him back and ask her to stop calling him. that is the stupidest thing i have ever heard.

you should not be making threats over the phone, thereby making yourself guilty as well and escalating the situation. that is the second dumbest thing i have ever heard.