@oathboundfamiliar I had a spam phone call today:

Them (standard scam opener): "I am the energy advisor for your postcode area."

Me (standard response to spam phone calls): "Do feel happy when you wake up in the morning knowing that you're going to be spending all day scamming people?"

So far so BAU. But then:

Them (not the standard response!): "Yes yes" (and drops the call).

Better trained than the ones who waste time arguing with me. But they still could have saved half a second by dropping the call without saying anything at all.