The issue for me is, for example, my wife drops my kid off for a camp and then the camp calls me in an emergency. So I can’t just only take notifications from known callers.
The kids that didn't survive were buried and no longer interact with us.
Neither of these calls often. Maybe once a year you get call like that. But when they call, you really want to pick up.
Can You guess why? Thats right - he also had a policy to not take phone calls from unknown numbers (especially foreign). They had to go to ours country ambassy in Spain (which took a while) and beg for help.
Since that day his father answers all calls :)
Only my close family are whitelisted.
Most time people call twice during an emergency. You could also say to call back again in case of emergency in your voicemail message.