I've been getting robot calls/voicemails (IRS/FBI impersonator) where the scammer leaves a callback number that matches the caller ID number. Always an 800 number. Any insight into how this works for the scammer, how they don't get caught doing this?
That's probably a different breed of scam. One in which they claim some tenuous relationship with you. Could be a form or survey you filled out, sweepstakes entry etc. For these, I would try the "take me off your list" response. It usually works for me for persistent, non-spoofed calls.
I should have been specific, these calls are impersonating the FBI and IRS. I do know that they started after I registered a domain with a real phone number - lesson learned.
