Did this once, after 40 minutes or so of pretending to run a dozen different diagnostic tests on my computer the guy asked me to read him an error from the log. I told him it said something like "Fatal System Exception 0x0051: Someone is trying to play a scam on you."
Context: kitboga[1] is a streamer on Twitch.tv who makes a living of wasting scammers' time. He uses voice modulation and a variety of tools (such as a fake banking website) to increase credibility in the eyes of the scammers he gets on the phone.
He just screamed "fuck you!" and hung up.