Answer the ringing doorbell, rescue the potatoes etc.....
I had some friends who used see how long they could keep a scammer on the phone for :
** Speak slowly pretending you are gullible, stupid & believe them for a couple of minutes
** Then say some is at the door and you need to see who it is & put them on hold for a couple of minutes
** Speak to them for a couple minutes, but make sure to forget all they said previously so they have to repeat it all again
** Then say there is a pan of potatoes boiling over & put them on hold for a couple of minutes
** Speak to them for a couple minutes, but make sure to forget all they said previously so they have to repeat it all again
** Invent something else you need to attend to & repeat ad nauseum
They would regularly waste hours doing this until they got bored doing this and reverted back to old fashioned mockery & abuse.