I'm a very wary phone answerer. I only answer on my caller ID phone - ID I recognize or far away friend's voice, or if I am expecting a call from a reputable source that fits with the ID. The other two phones, sans caller ID, are in case the house goes on fire when I'm in the kitchen, or similar scenario, like the roof falls in.
I swear, if I get one more senior help call for obtaining a device to button push if I am croaking, I'll be apoplectic. They start by saying I asked for the call, for what I had seen on TV. I don't have a ******* TV. Makes me wanna obtain my magic killer phone machete.