[VonGuard]

Yeah, running your own switch allows you to send whatever you want as caller ID. You get the subject's number, call 911 and claim there's a hostage crisis.

I miss the days when prank calls were about refrigerators running. Things are so mean on the Internet these days. Trolls play for keeps, not for luls.

[jacquesm]

Sounds to me as if that telco infrastructure could do with a bit more security.

[VonGuard]

Caller ID is not and never was intended to be secure.