I got a call from "Windows tech support" a few months ago, telling me my system was compromised. (It wasn't.)
So naturally I started trolling him, explaining why I need a W-9 to do business with them.
The criminal was undeterred, and continued his spiel.
(I use the word "criminal" intentionally. He was trying to scam me. I do not get calls from legitimate telemarketers because I am on the no-call list.)
I continued to ask for a W-9 while the criminal kept trying to scam me. Eventually I got bored with the joke and I straight up said, "You know I am trolling you, right? I am intentionally wasting your time."
He said "I know."
Yeah, sure you knew. Idiot.