I did something similar to this last week after getting recently inundated with phone spam/scam calls and ended up missing a very important phone call about a m

I did something similar to this last week after getting recently inundated with phone spam/scam calls and ended up missing a very important phone call about a medical emergency with my child at school because the school's system was down and they weren't able to call me from their number that I have in my contacts list. We need to stop trying to get end users to deploy ad-hoc solutions to the problem and update our phone systems to be resilient to these attacks.