I have started telling people that I need to whitelist them in order for me to take a call from them. If I have to expect call from someone new (e.g. need to ex

I have started telling people that I need to whitelist them in order for me to take a call from them. If I have to expect call from someone new (e.g. need to expect callback from some vendor, etc.) usually by asking "what number should I expect a call from?" -- usually they are fine answering that question, but if they won't or can't, I demand call back number that I can actually call, in response to voice mail. I understand not everyone can do this (especially for business expecting inbound calls) but at least for personal numbers, I really want to see the social norm shifting to "have the caller on a whitelist or they are ignored."